It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 23 137 is not a prime number.
For example, 23 137 can be divided by 17: 23 137 / 17 = 1 361.
For 23 137 to be a prime number, it would have been required that 23 137 has only two divisors, i.e., itself and 1.
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23 137 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 23 137 is about 152.109.
Thus, the square root of 23 137 is not an integer, and therefore 23 137 is not a square number.
The square of a number (here 23 137) is the result of the product of this number (23 137) by itself (i.e., 23 137 × 23 137); the square of 23 137 is sometimes called "raising 23 137 to the power 2", or "23 137 squared".
The square of 23 137 is 535 320 769 because 23 137 × 23 137 = 23 1372 = 535 320 769.
As a consequence, 23 137 is the square root of 535 320 769.
The multiples of 23 137 are all integers evenly divisible by 23 137, that is all numbers such that the remainder of the division by 23 137 is zero. There are infinitely many multiples of 23 137. The smallest multiples of 23 137 are: