It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 598 is not a prime number.
For example, 397 598 can be divided by 2: 397 598 / 2 = 198 799.
For 397 598 to be a prime number, it would have been required that 397 598 has only two divisors, i.e., itself and 1.
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397 598 is an even number, because it is evenly divisible by 2: 397 598 / 2 = 198 799.
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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 397 598 is about 630.554.
Thus, the square root of 397 598 is not an integer, and therefore 397 598 is not a square number.
The square of a number (here 397 598) is the result of the product of this number (397 598) by itself (i.e., 397 598 × 397 598); the square of 397 598 is sometimes called "raising 397 598 to the power 2", or "397 598 squared".
The square of 397 598 is 158 084 169 604 because 397 598 × 397 598 = 397 5982 = 158 084 169 604.
As a consequence, 397 598 is the square root of 158 084 169 604.
The multiples of 397 598 are all integers evenly divisible by 397 598, that is all numbers such that the remainder of the division by 397 598 is zero. There are infinitely many multiples of 397 598. The smallest multiples of 397 598 are: