It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 16 723 is not a prime number.
For example, 16 723 can be divided by 7: 16 723 / 7 = 2 389.
For 16 723 to be a prime number, it would have been required that 16 723 has only two divisors, i.e., itself and 1.
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16 723 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 16 723 is about 129.317.
Thus, the square root of 16 723 is not an integer, and therefore 16 723 is not a square number.
The square of a number (here 16 723) is the result of the product of this number (16 723) by itself (i.e., 16 723 × 16 723); the square of 16 723 is sometimes called "raising 16 723 to the power 2", or "16 723 squared".
The square of 16 723 is 279 658 729 because 16 723 × 16 723 = 16 7232 = 279 658 729.
As a consequence, 16 723 is the square root of 279 658 729.
The multiples of 16 723 are all integers evenly divisible by 16 723, that is all numbers such that the remainder of the division by 16 723 is zero. There are infinitely many multiples of 16 723. The smallest multiples of 16 723 are: