# Is 549 a prime number?

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

For 549, the answer is: No, 549 is not a prime number.

The list of all positive divisors (i.e., the list of all integers that divide 549) is as follows: 1, 3, 9, 61, 183, 549.

For 549 to be a prime number, it would have been required that 549 has only two divisors, i.e., itself and 1.

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As a consequence:

- 549 is a multiple of 1
- 549 is a multiple of 3
- 549 is a multiple of 9
- 549 is a multiple of 61
- 549 is a multiple of 183

For 549 to be a prime number, it would have been required that 549 has only two divisors, i.e., itself and 1.

### Is 549 a deficient number?

Yes, 549 is a deficient number, that is to say 549 is a natural number that is strictly larger than the sum of its proper divisors, i.e., the divisors of 549 without 549 itself (that is 1 + 3 + 9 + 61 + 183 = 257).