# Mathematical Algorithms | Number Digits

### Recent Articles on Number Digits !

- Automorphic Number
- Self Descriptive Number
- Motzkin number
- Narcissistic number
- Schröder–Hipparchus number
- Number of n digit stepping numbers
- Deserium Number
- K’th Boom Number
- Pandigital Product
- Neon Number
- Harshad (Or Niven) Number
- Tidy Number (Digits in non-decreasing Order)
- Seeds (Or Seed Roots) of a number
- Numbers having Unique (or Distinct) digits
- Build Lowest Number by Removing n digits from a given number
- n-th number with digits in {0, 1, 2, 3, 4, 5}
- Number of Digits in a^b
- Brahmagupta Fibonacci Identity
- First digit in factorial of a number
- Number with even sum of digits
- Largest even digit number not greater than N
- Number of digits in 2 raised to power n
- n-th number whose sum of digits is ten
- Minimum digits to remove to make a number Perfect Square
- Count digits in given number N which divide N
- Count digit groupings of a number with given constraints
- Print first k digits of 1/n where n is a positive integer
- Program to check if a given number is Lucky
- Check if a given number can be represented in given a no. of digits in any base
- Find element using minimum segments in Seven Segment Display
- Find nth term of the Dragon Curve Sequence
- Find the Largest Cube formed by Deleting minimum Digits from a number
- Find next greater number with same set of digits
- Find the Number which contain the digit d
- Find nth number that contains the digit k or divisible by k
- Find N integers with given difference between product and sum
- Find the number of consecutive zero at the end after multiplying n numbers
- Find first and last digits of a number
- Find a number x such that sum of x and its digits is equal to given n
- Find smallest permutation of given number
- Find maximum number that can be formed using digits of a given number
- Find count of digits in a number that divide the number
- Find the occurrences of digit d in the range [0..n]
- Find sum of digits in factorial of a number
- Find n-th element in a series with only 2 digits (4 and 7) allowed
- First digit in product of an array of numbers
- Find n’th number in a number system with only 3 and 4
- Find the smallest number whose digits multiply to a given number n
- Find the Largest number with given number of digits and sum of digits
- Form the largest number using at most one swap operation
- Form a number using corner digits of powers
- Position of n among the numbers made of 2, 3, 5 & 7
- Powers of 2 to required sum
- Expressing a number as sum of consecutive | Set 2 (Using odd factors)
- Sum of digits written in different bases from 2 to n-1
- Given a number N in decimal base, find number of its digits in any base (base b)
- Reverse a number using stack
- Check if a number is jumbled or not
- Number of digits in the product of two numbers
- Form the smallest number using at most one swap operation
- Difference between sums of odd and even digits
- Numbers having difference with digit sum more than s
- Count n digit numbers not having a particular digit
- Program to check Plus Perfect Number
- Total numbers with no repeated digits in a range
- K-th digit in ‘a’ raised to power ‘b’
- Possible to make a divisible by 3 number using all digits in an array
- Recursive sum of digit in n^x, where n and x are very large
- Check if all digits of a number divide it
- Counting numbers whose difference from reverse is a product of k
- Maximize a number considering permutations with values smaller than limit
- Number of decimal numbers of length k, that are strict monotone
- Count square and non-square numbers before n
- Counting numbers of n digits that are montone
- Count numbers in range L-R that are divisible by all of its non-zero digits
- Round the given number to nearest multiple of 10
- First occurrence of a digit in a given fraction
- Check if a number can be written as sum of three consecutive integers
- Count numbers with unit digit k in given range
- Convert to number with digits as 3 and 8 only
- Find a Number X whose sum with its digits is equal to N
- Count different numbers that can be generated such that there digits sum is equal to ‘n’
- Check whether a number can be represented by sum of two squares
- Total no of 1’s in numbers
- Largest number with prime digits
- Largest smaller number possible using only one swap operation
- Representation of a number in powers of other
- Sum of digits of a given number to a given power
- Number of n digit numbers that do not contain 9
- Check if given number can be represented as sum of two great numbers
- Biggest integer which has maximum digit sum in range from 1 to n
- Largest number less than N whose each digit is prime number
- Smallest x such that 1*n, 2*n, … x*n have all digits from 1 to 9
- Count of numbers satisfying m + sum(m) + sum(sum(m)) = N
- Next higher palindromic number using the same set of digits
- Program to count digits in an integer (3 Different Methods)
- Next higher number using atmost one swap operation
- Smallest number k such that the product of digits of k is equal to n
- Count number of digits after decimal on dividing a number
- Find n-th element in a series with only 2 digits (4 and 7) allowed | Set 2 (log(n) method)
- To check a number is palindrome or not without using any extra space
- Minimum number with digits as 4 and 7 only and given sum
- Number of times a number can be replaced by the sum of its digits until it only contains one digit
- Print last k digits of a^b (a raised to power b)
- Number of digits in the nth number made of given four digits
- Count total number of digits from 1 to n
- Count numbers with difference between number and its digit sum greater than specific value
- Given a number n, find the first k digits of n^n
- Generate k digit numbers with digits in strictly increasing order
- Pandigital number in a given base
- Reverse digits of an integer with overflow handled
- Number of occurrences of 2 as a digit in numbers from 0 to n
- Digital Root (repeated digital sum) of the given large integer
- Largest number smaller than or equal to n and digits in non-decreasing order
- Check if frequency of each digit is less than the digit
- N’th palindrome of K digits
- Maximum and minimum sums from two numbers with digit replacements
- Last non-zero digit of a factorial
- Count numbers with same first and last digits
- Generate all palindromic numbers less than n
- Minimum sum of two numbers formed from digits of an array
- Smallest number by rearranging digits of a given number
- Largest palindrome which is product of two n-digit numbers
- Count ways to spell a number with repeated digits
- Finding sum of digits of a number until sum becomes single digit
- Finding number of digits in n’th Fibonacci number
- Reverse and Add Function
- Print all n-digit numbers whose sum of digits equals to given sum
- Program to find last digit of n’th Fibonnaci Number
- Count positive integers with 0 as a digit and maximum ‘d’ digits
- Count ‘d’ digit positive integers with 0 as a digit
- Count numbers having 0 as a digit
- Check if a given number is Fancy
- Find the most frequent digit without using array/string
- Count total number of N digit numbers such that the difference between sum of even and odd digits is 1
- Count of n digit numbers whose sum of digits equals to given sum
- Total number of non-decreasing numbers with n digits
- Count numbers from 1 to n that have 4 as a digit
- Compute sum of digits in all numbers from 1 to n
- Remove repeated digits in a given number
- Replace all ‘0’ with ‘5’ in an input Integer
- Count numbers that don’t contain 3
- Write a C program to reverse digits of a number

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