It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 996 667 is not a prime number.
For example, 996 667 can be divided by 7: 996 667 / 7 = 142 381.
For 996 667 to be a prime number, it would have been required that 996 667 has only two divisors, i.e., itself and 1.
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996 667 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 996 667 is about 998.332.
Thus, the square root of 996 667 is not an integer, and therefore 996 667 is not a square number.
The square of a number (here 996 667) is the result of the product of this number (996 667) by itself (i.e., 996 667 × 996 667); the square of 996 667 is sometimes called "raising 996 667 to the power 2", or "996 667 squared".
The square of 996 667 is 993 345 108 889 because 996 667 × 996 667 = 996 6672 = 993 345 108 889.
As a consequence, 996 667 is the square root of 993 345 108 889.
The multiples of 996 667 are all integers evenly divisible by 996 667, that is all numbers such that the remainder of the division by 996 667 is zero. There are infinitely many multiples of 996 667. The smallest multiples of 996 667 are: