# Is 249 a prime number?

It is possible to find out using mathematical methods whether a given integer is a prime number or not.

For 249, the answer is: No, 249 is not a prime number.

The list of all positive divisors (i.e., the list of all integers that divide 249) is as follows: 1, 3, 83, 249.

For 249 to be a prime number, it would have been required that 249 has only two divisors, i.e., itself and 1.

Find out more:

As a consequence:

For 249 to be a prime number, it would have been required that 249 has only two divisors, i.e., itself and 1.

However, 249 is a **semiprime** (also called biprime or 2-almost-prime), because it is the product of a two non-necessarily distinct prime numbers. Indeed, 249 = 3 x 83, where 3 and 83 are both prime numbers.

### Is 249 a deficient number?

Yes, 249 is a deficient number, that is to say 249 is a natural number that is strictly larger than the sum of its proper divisors, i.e., the divisors of 249 without 249 itself (that is 1 + 3 + 83 = 87).