It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 716 is not a prime number.
For example, 720 716 can be divided by 2: 720 716 / 2 = 360 358.
For 720 716 to be a prime number, it would have been required that 720 716 has only two divisors, i.e., itself and 1.
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720 716 is an even number, because it is evenly divisible by 2: 720 716 / 2 = 360 358.
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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 720 716 is about 848.950.
Thus, the square root of 720 716 is not an integer, and therefore 720 716 is not a square number.
The square of a number (here 720 716) is the result of the product of this number (720 716) by itself (i.e., 720 716 × 720 716); the square of 720 716 is sometimes called "raising 720 716 to the power 2", or "720 716 squared".
The square of 720 716 is 519 431 552 656 because 720 716 × 720 716 = 720 7162 = 519 431 552 656.
As a consequence, 720 716 is the square root of 519 431 552 656.
The multiples of 720 716 are all integers evenly divisible by 720 716, that is all numbers such that the remainder of the division by 720 716 is zero. There are infinitely many multiples of 720 716. The smallest multiples of 720 716 are: