It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 997 424 is not a prime number.
For example, 997 424 can be divided by 2: 997 424 / 2 = 498 712.
For 997 424 to be a prime number, it would have been required that 997 424 has only two divisors, i.e., itself and 1.
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997 424 is an even number, because it is evenly divisible by 2: 997 424 / 2 = 498 712.
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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 997 424 is about 998.711.
Thus, the square root of 997 424 is not an integer, and therefore 997 424 is not a square number.
The square of a number (here 997 424) is the result of the product of this number (997 424) by itself (i.e., 997 424 × 997 424); the square of 997 424 is sometimes called "raising 997 424 to the power 2", or "997 424 squared".
The square of 997 424 is 994 854 635 776 because 997 424 × 997 424 = 997 4242 = 994 854 635 776.
As a consequence, 997 424 is the square root of 994 854 635 776.
The multiples of 997 424 are all integers evenly divisible by 997 424, that is all numbers such that the remainder of the division by 997 424 is zero. There are infinitely many multiples of 997 424. The smallest multiples of 997 424 are: