It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 707 is not a prime number.
For example, 397 707 can be divided by 3: 397 707 / 3 = 132 569.
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For 397 707 to be a prime number, it would have been required that 397 707 has only two divisors, i.e., itself and 1.
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397 707 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 397 707 is about 630.640.
Thus, the square root of 397 707 is not an integer, and therefore 397 707 is not a square number.
The square of a number (here 397 707) is the result of the product of this number (397 707) by itself (i.e., 397 707 × 397 707); the square of 397 707 is sometimes called "raising 397 707 to the power 2", or "397 707 squared".
The square of 397 707 is 158 170 857 849 because 397 707 × 397 707 = 397 7072 = 158 170 857 849.
As a consequence, 397 707 is the square root of 158 170 857 849.
The multiples of 397 707 are all integers evenly divisible by 397 707, that is all numbers such that the remainder of the division by 397 707 is zero. There are infinitely many multiples of 397 707. The smallest multiples of 397 707 are: