It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 516 is not a prime number.
For example, 397 516 can be divided by 2: 397 516 / 2 = 198 758.
For 397 516 to be a prime number, it would have been required that 397 516 has only two divisors, i.e., itself and 1.
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397 516 is an even number, because it is evenly divisible by 2: 397 516 / 2 = 198 758.
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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 397 516 is about 630.489.
Thus, the square root of 397 516 is not an integer, and therefore 397 516 is not a square number.
The square of a number (here 397 516) is the result of the product of this number (397 516) by itself (i.e., 397 516 × 397 516); the square of 397 516 is sometimes called "raising 397 516 to the power 2", or "397 516 squared".
The square of 397 516 is 158 018 970 256 because 397 516 × 397 516 = 397 5162 = 158 018 970 256.
As a consequence, 397 516 is the square root of 158 018 970 256.
The multiples of 397 516 are all integers evenly divisible by 397 516, that is all numbers such that the remainder of the division by 397 516 is zero. There are infinitely many multiples of 397 516. The smallest multiples of 397 516 are: