Number 509 is a prime number.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. Therefore we consider 509 as a prime number, because:

- 509 is a natural number greater than 1,
- 509 is not a product of 2 smaller natural numbers (it can be divided only by 1 and itself)

Number of factors: 2.

List of factors/divisors: 1, 509.

Parity: 509 is an odd number.

Perfect square: no (a square number or perfect square is an integer that is the square of an integer).

Perfect number: no, because the sum of its proper divisors is 1 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 502 no | 503 yes | 504 no | 505 no | 506 no | 507 no | 508 no | 509 yes | 510 no | 511 no | 512 no | 513 no | 514 no | 515 no | 516 no |
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