It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 987 371 is not a prime number.
For example, 987 371 can be divided by 7: 987 371 / 7 = 141 053.
For 987 371 to be a prime number, it would have been required that 987 371 has only two divisors, i.e., itself and 1.
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987 371 is an odd number, because it is not evenly divisible by 2.
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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 987 371 is about 993.665.
Thus, the square root of 987 371 is not an integer, and therefore 987 371 is not a square number.
The square of a number (here 987 371) is the result of the product of this number (987 371) by itself (i.e., 987 371 × 987 371); the square of 987 371 is sometimes called "raising 987 371 to the power 2", or "987 371 squared".
The square of 987 371 is 974 901 491 641 because 987 371 × 987 371 = 987 3712 = 974 901 491 641.
As a consequence, 987 371 is the square root of 974 901 491 641.
The multiples of 987 371 are all integers evenly divisible by 987 371, that is all numbers such that the remainder of the division by 987 371 is zero. There are infinitely many multiples of 987 371. The smallest multiples of 987 371 are: