It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 996 424 is not a prime number.
For example, 996 424 can be divided by 2: 996 424 / 2 = 498 212.
For 996 424 to be a prime number, it would have been required that 996 424 has only two divisors, i.e., itself and 1.
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996 424 is an even number, because it is evenly divisible by 2: 996 424 / 2 = 498 212.
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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 996 424 is about 998.210.
Thus, the square root of 996 424 is not an integer, and therefore 996 424 is not a square number.
The square of a number (here 996 424) is the result of the product of this number (996 424) by itself (i.e., 996 424 × 996 424); the square of 996 424 is sometimes called "raising 996 424 to the power 2", or "996 424 squared".
The square of 996 424 is 992 860 787 776 because 996 424 × 996 424 = 996 4242 = 992 860 787 776.
As a consequence, 996 424 is the square root of 992 860 787 776.
The multiples of 996 424 are all integers evenly divisible by 996 424, that is all numbers such that the remainder of the division by 996 424 is zero. There are infinitely many multiples of 996 424. The smallest multiples of 996 424 are: