It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 102 988 is not a prime number.
For example, 102 988 can be divided by 2: 102 988 / 2 = 51 494.
For 102 988 to be a prime number, it would have been required that 102 988 has only two divisors, i.e., itself and 1.
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102 988 is an even number, because it is evenly divisible by 2: 102 988 / 2 = 51 494.
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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 102 988 is about 320.917.
Thus, the square root of 102 988 is not an integer, and therefore 102 988 is not a square number.
The square of a number (here 102 988) is the result of the product of this number (102 988) by itself (i.e., 102 988 × 102 988); the square of 102 988 is sometimes called "raising 102 988 to the power 2", or "102 988 squared".
The square of 102 988 is 10 606 528 144 because 102 988 × 102 988 = 102 9882 = 10 606 528 144.
As a consequence, 102 988 is the square root of 10 606 528 144.
The multiples of 102 988 are all integers evenly divisible by 102 988, that is all numbers such that the remainder of the division by 102 988 is zero. There are infinitely many multiples of 102 988. The smallest multiples of 102 988 are: