It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 722 is not a prime number.
For example, 397 722 can be divided by 2: 397 722 / 2 = 198 861.
For 397 722 to be a prime number, it would have been required that 397 722 has only two divisors, i.e., itself and 1.
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397 722 is an even number, because it is evenly divisible by 2: 397 722 / 2 = 198 861.
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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 397 722 is about 630.652.
Thus, the square root of 397 722 is not an integer, and therefore 397 722 is not a square number.
The square of a number (here 397 722) is the result of the product of this number (397 722) by itself (i.e., 397 722 × 397 722); the square of 397 722 is sometimes called "raising 397 722 to the power 2", or "397 722 squared".
The square of 397 722 is 158 182 789 284 because 397 722 × 397 722 = 397 7222 = 158 182 789 284.
As a consequence, 397 722 is the square root of 158 182 789 284.
The multiples of 397 722 are all integers evenly divisible by 397 722, that is all numbers such that the remainder of the division by 397 722 is zero. There are infinitely many multiples of 397 722. The smallest multiples of 397 722 are: