It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 997 387 is not a prime number.
For example, 997 387 can be divided by 47: 997 387 / 47 = 21 221.
For 997 387 to be a prime number, it would have been required that 997 387 has only two divisors, i.e., itself and 1.
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997 387 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 997 387 is about 998.693.
Thus, the square root of 997 387 is not an integer, and therefore 997 387 is not a square number.
The square of a number (here 997 387) is the result of the product of this number (997 387) by itself (i.e., 997 387 × 997 387); the square of 997 387 is sometimes called "raising 997 387 to the power 2", or "997 387 squared".
The square of 997 387 is 994 780 827 769 because 997 387 × 997 387 = 997 3872 = 994 780 827 769.
As a consequence, 997 387 is the square root of 994 780 827 769.
The multiples of 997 387 are all integers evenly divisible by 997 387, that is all numbers such that the remainder of the division by 997 387 is zero. There are infinitely many multiples of 997 387. The smallest multiples of 997 387 are: