It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 494 is not a prime number.
For example, 397 494 can be divided by 2: 397 494 / 2 = 198 747.
For 397 494 to be a prime number, it would have been required that 397 494 has only two divisors, i.e., itself and 1.
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397 494 is an even number, because it is evenly divisible by 2: 397 494 / 2 = 198 747.
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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 397 494 is about 630.471.
Thus, the square root of 397 494 is not an integer, and therefore 397 494 is not a square number.
The square of a number (here 397 494) is the result of the product of this number (397 494) by itself (i.e., 397 494 × 397 494); the square of 397 494 is sometimes called "raising 397 494 to the power 2", or "397 494 squared".
The square of 397 494 is 158 001 480 036 because 397 494 × 397 494 = 397 4942 = 158 001 480 036.
As a consequence, 397 494 is the square root of 158 001 480 036.
The multiples of 397 494 are all integers evenly divisible by 397 494, that is all numbers such that the remainder of the division by 397 494 is zero. There are infinitely many multiples of 397 494. The smallest multiples of 397 494 are: