# Is 69 a prime number?

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

For 69, the answer is: No, 69 is not a prime number.

The list of all positive divisors (i.e., the list of all integers that divide 69) is as follows: 1, 3, 23, 69.

For 69 to be a prime number, it would have been required that 69 has only two divisors, i.e., itself and 1.

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As a consequence:

For 69 to be a prime number, it would have been required that 69 has only two divisors, i.e., itself and 1.

However, 69 is a **semiprime** (also called biprime or 2-almost-prime), because it is the product of a two non-necessarily distinct prime numbers. Indeed, 69 = 3 x 23, where 3 and 23 are both prime numbers.

### Is 69 a deficient number?

Yes, 69 is a deficient number, that is to say 69 is a natural number that is strictly larger than the sum of its proper divisors, i.e., the divisors of 69 without 69 itself (that is 1 + 3 + 23 = 27).