those numbers which are only divisible by 1 and themself
check that number is even or odd
test whether given year is leap or not
A neon number is a number where the sum of digits of square of the number is equal to the number. For example if the input number is 9, its square is 9*9 = 81 and sum of the digits is 9. i.e. 9 is a neon number
An Armstrong number is a number such that the sum ! of its digits raised to the third power is equal to the number ! itself. For example, 371 is an Armstrong number
In mathematics an automorphic number (sometimes referred to as a circular number) is a number whose square "ends" in the same digits as the number itself. For example, 52 = 25, ... so 5, 6, 76 and 890625 are all automorphic numbers
check for palindrom(string and integer)
find the factorial of the number
Strong number is a special number whose sum of factorial of digits is equal to the original number.
In number theory, a perfect number is a positive integer that is equal to the sum of its proper positive divisors
a series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 1, 1, 2, 3, 5, 8, etc.
program to find out largest number out of the list