It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 87 988 is not a prime number.
For example, 87 988 can be divided by 2: 87 988 / 2 = 43 994.
For 87 988 to be a prime number, it would have been required that 87 988 has only two divisors, i.e., itself and 1.
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87 988 is an even number, because it is evenly divisible by 2: 87 988 / 2 = 43 994.
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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 87 988 is about 296.628.
Thus, the square root of 87 988 is not an integer, and therefore 87 988 is not a square number.
The square of a number (here 87 988) is the result of the product of this number (87 988) by itself (i.e., 87 988 × 87 988); the square of 87 988 is sometimes called "raising 87 988 to the power 2", or "87 988 squared".
The square of 87 988 is 7 741 888 144 because 87 988 × 87 988 = 87 9882 = 7 741 888 144.
As a consequence, 87 988 is the square root of 7 741 888 144.
The multiples of 87 988 are all integers evenly divisible by 87 988, that is all numbers such that the remainder of the division by 87 988 is zero. There are infinitely many multiples of 87 988. The smallest multiples of 87 988 are: