It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 987 018 is not a prime number.
For example, 987 018 can be divided by 2: 987 018 / 2 = 493 509.
For 987 018 to be a prime number, it would have been required that 987 018 has only two divisors, i.e., itself and 1.
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987 018 is an even number, because it is evenly divisible by 2: 987 018 / 2 = 493 509.
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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 987 018 is about 993.488.
Thus, the square root of 987 018 is not an integer, and therefore 987 018 is not a square number.
The square of a number (here 987 018) is the result of the product of this number (987 018) by itself (i.e., 987 018 × 987 018); the square of 987 018 is sometimes called "raising 987 018 to the power 2", or "987 018 squared".
The square of 987 018 is 974 204 532 324 because 987 018 × 987 018 = 987 0182 = 974 204 532 324.
As a consequence, 987 018 is the square root of 974 204 532 324.
The multiples of 987 018 are all integers evenly divisible by 987 018, that is all numbers such that the remainder of the division by 987 018 is zero. There are infinitely many multiples of 987 018. The smallest multiples of 987 018 are: