Armstrong number is a number that is equal to the sum of cubes of its digits. For example 0, 1, 153, 370, 371 and 407 are the Armstrong numbers.

What are Armstrong numbers between 1 to 1000?

In the range 0 to 999 there exists six Armstrong numbers- 0, 1, 153, 370, 371 and 407 . In the range 1000 to 9999 there are three Armstrong numbers- 1634, 8208 and 9474 .

How do I know my Armstrong number?

In case of an Armstrong number of 3 digits, the sum of cubes of each digit is equal to the number itself. For example: 153 = 1*1*1 + 5*5*5 + 3*3*3 // 153 is an Armstrong number.