Number 133 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 133 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 133 below).

Number of factors: 4.

List of factors/divisors: 1, 7, 19, 133.

Parity: 133 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 27 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 126 no | 127 yes | 128 no | 129 no | 130 no | 131 yes | 132 no | 133 no | 134 no | 135 no | 136 no | 137 yes | 138 no | 139 yes | 140 no |
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