It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 987 988 is not a prime number.
For example, 987 988 can be divided by 2: 987 988 / 2 = 493 994.
For 987 988 to be a prime number, it would have been required that 987 988 has only two divisors, i.e., itself and 1.
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987 988 is an even number, because it is evenly divisible by 2: 987 988 / 2 = 493 994.
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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 987 988 is about 993.976.
Thus, the square root of 987 988 is not an integer, and therefore 987 988 is not a square number.
The square of a number (here 987 988) is the result of the product of this number (987 988) by itself (i.e., 987 988 × 987 988); the square of 987 988 is sometimes called "raising 987 988 to the power 2", or "987 988 squared".
The square of 987 988 is 976 120 288 144 because 987 988 × 987 988 = 987 9882 = 976 120 288 144.
As a consequence, 987 988 is the square root of 976 120 288 144.
The multiples of 987 988 are all integers evenly divisible by 987 988, that is all numbers such that the remainder of the division by 987 988 is zero. There are infinitely many multiples of 987 988. The smallest multiples of 987 988 are: