It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 720 423 832 is not a prime number.
For example, 720 423 832 can be divided by 2: 720 423 832 / 2 = 360 211 916.
For 720 423 832 to be a prime number, it would have been required that 720 423 832 has only two divisors, i.e., itself and 1.
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720 423 832 is an even number, because it is evenly divisible by 2: 720 423 832 / 2 = 360 211 916.
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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 720 423 832 is about 26 840.712.
Thus, the square root of 720 423 832 is not an integer, and therefore 720 423 832 is not a square number.
The square of a number (here 720 423 832) is the result of the product of this number (720 423 832) by itself (i.e., 720 423 832 × 720 423 832); the square of 720 423 832 is sometimes called "raising 720 423 832 to the power 2", or "720 423 832 squared".
The square of 720 423 832 is 519 010 497 713 564 224 because 720 423 832 × 720 423 832 = 720 423 8322 = 519 010 497 713 564 224.
As a consequence, 720 423 832 is the square root of 519 010 497 713 564 224.
720 423 832 is a number with 9 digits.
The multiples of 720 423 832 are all integers evenly divisible by 720 423 832, that is all numbers such that the remainder of the division by 720 423 832 is zero. There are infinitely many multiples of 720 423 832. The smallest multiples of 720 423 832 are: