It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 23 659 is not a prime number.
For example, 23 659 can be divided by 59: 23 659 / 59 = 401.
For 23 659 to be a prime number, it would have been required that 23 659 has only two divisors, i.e., itself and 1.
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23 659 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 23 659 is about 153.815.
Thus, the square root of 23 659 is not an integer, and therefore 23 659 is not a square number.
The square of a number (here 23 659) is the result of the product of this number (23 659) by itself (i.e., 23 659 × 23 659); the square of 23 659 is sometimes called "raising 23 659 to the power 2", or "23 659 squared".
The square of 23 659 is 559 748 281 because 23 659 × 23 659 = 23 6592 = 559 748 281.
As a consequence, 23 659 is the square root of 559 748 281.
The multiples of 23 659 are all integers evenly divisible by 23 659, that is all numbers such that the remainder of the division by 23 659 is zero. There are infinitely many multiples of 23 659. The smallest multiples of 23 659 are: