It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 997 396 is not a prime number.
For example, 997 396 can be divided by 2: 997 396 / 2 = 498 698.
For 997 396 to be a prime number, it would have been required that 997 396 has only two divisors, i.e., itself and 1.
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997 396 is an even number, because it is evenly divisible by 2: 997 396 / 2 = 498 698.
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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 997 396 is about 998.697.
Thus, the square root of 997 396 is not an integer, and therefore 997 396 is not a square number.
The square of a number (here 997 396) is the result of the product of this number (997 396) by itself (i.e., 997 396 × 997 396); the square of 997 396 is sometimes called "raising 997 396 to the power 2", or "997 396 squared".
The square of 997 396 is 994 798 780 816 because 997 396 × 997 396 = 997 3962 = 994 798 780 816.
As a consequence, 997 396 is the square root of 994 798 780 816.
The multiples of 997 396 are all integers evenly divisible by 997 396, that is all numbers such that the remainder of the division by 997 396 is zero. There are infinitely many multiples of 997 396. The smallest multiples of 997 396 are: