It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 996 988 is not a prime number.
For example, 996 988 can be divided by 2: 996 988 / 2 = 498 494.
For 996 988 to be a prime number, it would have been required that 996 988 has only two divisors, i.e., itself and 1.
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996 988 is an even number, because it is evenly divisible by 2: 996 988 / 2 = 498 494.
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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 996 988 is about 998.493.
Thus, the square root of 996 988 is not an integer, and therefore 996 988 is not a square number.
The square of a number (here 996 988) is the result of the product of this number (996 988) by itself (i.e., 996 988 × 996 988); the square of 996 988 is sometimes called "raising 996 988 to the power 2", or "996 988 squared".
The square of 996 988 is 993 985 072 144 because 996 988 × 996 988 = 996 9882 = 993 985 072 144.
As a consequence, 996 988 is the square root of 993 985 072 144.
The multiples of 996 988 are all integers evenly divisible by 996 988, that is all numbers such that the remainder of the division by 996 988 is zero. There are infinitely many multiples of 996 988. The smallest multiples of 996 988 are: