Number 729 is not a prime number. It is a composite number.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. We do not consider 729 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 729 below).

Number of factors: 7.

List of factors/divisors: 1, 3, 9, 27, 81, 243, 729.

Parity: 729 is an odd number.

Perfect square: yes, because 729=27^{2} (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 364 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 722 no | 723 no | 724 no | 725 no | 726 no | 727 yes | 728 no | 729 no | 730 no | 731 no | 732 no | 733 yes | 734 no | 735 no | 736 no |
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