It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 722 is not a prime number.
For example, 720 722 can be divided by 2: 720 722 / 2 = 360 361.
For 720 722 to be a prime number, it would have been required that 720 722 has only two divisors, i.e., itself and 1.
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720 722 is an even number, because it is evenly divisible by 2: 720 722 / 2 = 360 361.
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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 720 722 is about 848.953.
Thus, the square root of 720 722 is not an integer, and therefore 720 722 is not a square number.
The square of a number (here 720 722) is the result of the product of this number (720 722) by itself (i.e., 720 722 × 720 722); the square of 720 722 is sometimes called "raising 720 722 to the power 2", or "720 722 squared".
The square of 720 722 is 519 440 201 284 because 720 722 × 720 722 = 720 7222 = 519 440 201 284.
As a consequence, 720 722 is the square root of 519 440 201 284.
The multiples of 720 722 are all integers evenly divisible by 720 722, that is all numbers such that the remainder of the division by 720 722 is zero. There are infinitely many multiples of 720 722. The smallest multiples of 720 722 are: