It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 702 is not a prime number.
For example, 397 702 can be divided by 2: 397 702 / 2 = 198 851.
For 397 702 to be a prime number, it would have been required that 397 702 has only two divisors, i.e., itself and 1.
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397 702 is an even number, because it is evenly divisible by 2: 397 702 / 2 = 198 851.
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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 397 702 is about 630.636.
Thus, the square root of 397 702 is not an integer, and therefore 397 702 is not a square number.
The square of a number (here 397 702) is the result of the product of this number (397 702) by itself (i.e., 397 702 × 397 702); the square of 397 702 is sometimes called "raising 397 702 to the power 2", or "397 702 squared".
The square of 397 702 is 158 166 880 804 because 397 702 × 397 702 = 397 7022 = 158 166 880 804.
As a consequence, 397 702 is the square root of 158 166 880 804.
The multiples of 397 702 are all integers evenly divisible by 397 702, that is all numbers such that the remainder of the division by 397 702 is zero. There are infinitely many multiples of 397 702. The smallest multiples of 397 702 are: