It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 8 787 974 is not a prime number.
For example, 8 787 974 can be divided by 2: 8 787 974 / 2 = 4 393 987.
For 8 787 974 to be a prime number, it would have been required that 8 787 974 has only two divisors, i.e., itself and 1.
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8 787 974 is an even number, because it is evenly divisible by 2: 8 787 974 / 2 = 4 393 987.
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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 8 787 974 is about 2 964.452.
Thus, the square root of 8 787 974 is not an integer, and therefore 8 787 974 is not a square number.
The square of a number (here 8 787 974) is the result of the product of this number (8 787 974) by itself (i.e., 8 787 974 × 8 787 974); the square of 8 787 974 is sometimes called "raising 8 787 974 to the power 2", or "8 787 974 squared".
The square of 8 787 974 is 77 228 487 024 676 because 8 787 974 × 8 787 974 = 8 787 9742 = 77 228 487 024 676.
As a consequence, 8 787 974 is the square root of 77 228 487 024 676.
The multiples of 8 787 974 are all integers evenly divisible by 8 787 974, that is all numbers such that the remainder of the division by 8 787 974 is zero. There are infinitely many multiples of 8 787 974. The smallest multiples of 8 787 974 are: