It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 7 980 723 is not a prime number.
For example, 7 980 723 can be divided by 3: 7 980 723 / 3 = 2 660 241.
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For 7 980 723 to be a prime number, it would have been required that 7 980 723 has only two divisors, i.e., itself and 1.
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7 980 723 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 7 980 723 is about 2 825.017.
Thus, the square root of 7 980 723 is not an integer, and therefore 7 980 723 is not a square number.
The square of a number (here 7 980 723) is the result of the product of this number (7 980 723) by itself (i.e., 7 980 723 × 7 980 723); the square of 7 980 723 is sometimes called "raising 7 980 723 to the power 2", or "7 980 723 squared".
The square of 7 980 723 is 63 691 939 602 729 because 7 980 723 × 7 980 723 = 7 980 7232 = 63 691 939 602 729.
As a consequence, 7 980 723 is the square root of 63 691 939 602 729.
The multiples of 7 980 723 are all integers evenly divisible by 7 980 723, that is all numbers such that the remainder of the division by 7 980 723 is zero. There are infinitely many multiples of 7 980 723. The smallest multiples of 7 980 723 are: