It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 671 is not a prime number.
For example, 397 671 can be divided by 3: 397 671 / 3 = 132 557.
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For 397 671 to be a prime number, it would have been required that 397 671 has only two divisors, i.e., itself and 1.
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397 671 is an odd number, because it is not evenly divisible by 2.
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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 397 671 is about 630.612.
Thus, the square root of 397 671 is not an integer, and therefore 397 671 is not a square number.
The square of a number (here 397 671) is the result of the product of this number (397 671) by itself (i.e., 397 671 × 397 671); the square of 397 671 is sometimes called "raising 397 671 to the power 2", or "397 671 squared".
The square of 397 671 is 158 142 224 241 because 397 671 × 397 671 = 397 6712 = 158 142 224 241.
As a consequence, 397 671 is the square root of 158 142 224 241.
The multiples of 397 671 are all integers evenly divisible by 397 671, that is all numbers such that the remainder of the division by 397 671 is zero. There are infinitely many multiples of 397 671. The smallest multiples of 397 671 are: