Number 891 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 891 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 891 below).

Number of factors: 10.

List of factors/divisors: 1, 3, 9, 11, 27, 33, 81, 99, 297, 891.

Parity: 891 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 561 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 884 no | 885 no | 886 no | 887 yes | 888 no | 889 no | 890 no | 891 no | 892 no | 893 no | 894 no | 895 no | 896 no | 897 no | 898 no |
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