It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 996 018 is not a prime number.
For example, 996 018 can be divided by 2: 996 018 / 2 = 498 009.
For 996 018 to be a prime number, it would have been required that 996 018 has only two divisors, i.e., itself and 1.
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996 018 is an even number, because it is evenly divisible by 2: 996 018 / 2 = 498 009.
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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 996 018 is about 998.007.
Thus, the square root of 996 018 is not an integer, and therefore 996 018 is not a square number.
The square of a number (here 996 018) is the result of the product of this number (996 018) by itself (i.e., 996 018 × 996 018); the square of 996 018 is sometimes called "raising 996 018 to the power 2", or "996 018 squared".
The square of 996 018 is 992 051 856 324 because 996 018 × 996 018 = 996 0182 = 992 051 856 324.
As a consequence, 996 018 is the square root of 992 051 856 324.
The multiples of 996 018 are all integers evenly divisible by 996 018, that is all numbers such that the remainder of the division by 996 018 is zero. There are infinitely many multiples of 996 018. The smallest multiples of 996 018 are: