It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 997 627 644 is not a prime number.
For example, 997 627 644 can be divided by 2: 997 627 644 / 2 = 498 813 822.
For 997 627 644 to be a prime number, it would have been required that 997 627 644 has only two divisors, i.e., itself and 1.
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997 627 644 is an even number, because it is evenly divisible by 2: 997 627 644 / 2 = 498 813 822.
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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 997 627 644 is about 31 585.244.
Thus, the square root of 997 627 644 is not an integer, and therefore 997 627 644 is not a square number.
The square of a number (here 997 627 644) is the result of the product of this number (997 627 644) by itself (i.e., 997 627 644 × 997 627 644); the square of 997 627 644 is sometimes called "raising 997 627 644 to the power 2", or "997 627 644 squared".
The square of 997 627 644 is 995 260 916 072 990 720 because 997 627 644 × 997 627 644 = 997 627 6442 = 995 260 916 072 990 720.
As a consequence, 997 627 644 is the square root of 995 260 916 072 990 720.
997 627 644 is a number with 9 digits.
The multiples of 997 627 644 are all integers evenly divisible by 997 627 644, that is all numbers such that the remainder of the division by 997 627 644 is zero. There are infinitely many multiples of 997 627 644. The smallest multiples of 997 627 644 are: