It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 790 628 023 is not a prime number.
For example, 790 628 023 can be divided by 14 753: 790 628 023 / 14753 = 53 591.
For 790 628 023 to be a prime number, it would have been required that 790 628 023 has only two divisors, i.e., itself and 1.
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790 628 023 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 790 628 023 is about 28 118.108.
Thus, the square root of 790 628 023 is not an integer, and therefore 790 628 023 is not a square number.
The square of a number (here 790 628 023) is the result of the product of this number (790 628 023) by itself (i.e., 790 628 023 × 790 628 023); the square of 790 628 023 is sometimes called "raising 790 628 023 to the power 2", or "790 628 023 squared".
The square of 790 628 023 is 625 092 670 752 888 576 because 790 628 023 × 790 628 023 = 790 628 0232 = 625 092 670 752 888 576.
As a consequence, 790 628 023 is the square root of 625 092 670 752 888 576.
790 628 023 is a number with 9 digits.
The multiples of 790 628 023 are all integers evenly divisible by 790 628 023, that is all numbers such that the remainder of the division by 790 628 023 is zero. There are infinitely many multiples of 790 628 023. The smallest multiples of 790 628 023 are: