It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 712 is not a prime number.
For example, 397 712 can be divided by 2: 397 712 / 2 = 198 856.
For 397 712 to be a prime number, it would have been required that 397 712 has only two divisors, i.e., itself and 1.
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397 712 is an even number, because it is evenly divisible by 2: 397 712 / 2 = 198 856.
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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 397 712 is about 630.644.
Thus, the square root of 397 712 is not an integer, and therefore 397 712 is not a square number.
The square of a number (here 397 712) is the result of the product of this number (397 712) by itself (i.e., 397 712 × 397 712); the square of 397 712 is sometimes called "raising 397 712 to the power 2", or "397 712 squared".
The square of 397 712 is 158 174 834 944 because 397 712 × 397 712 = 397 7122 = 158 174 834 944.
As a consequence, 397 712 is the square root of 158 174 834 944.
The multiples of 397 712 are all integers evenly divisible by 397 712, that is all numbers such that the remainder of the division by 397 712 is zero. There are infinitely many multiples of 397 712. The smallest multiples of 397 712 are: