It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 704 518 is not a prime number.
For example, 704 518 can be divided by 2: 704 518 / 2 = 352 259.
For 704 518 to be a prime number, it would have been required that 704 518 has only two divisors, i.e., itself and 1.
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704 518 is an even number, because it is evenly divisible by 2: 704 518 / 2 = 352 259.
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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 704 518 is about 839.356.
Thus, the square root of 704 518 is not an integer, and therefore 704 518 is not a square number.
The square of a number (here 704 518) is the result of the product of this number (704 518) by itself (i.e., 704 518 × 704 518); the square of 704 518 is sometimes called "raising 704 518 to the power 2", or "704 518 squared".
The square of 704 518 is 496 345 612 324 because 704 518 × 704 518 = 704 5182 = 496 345 612 324.
As a consequence, 704 518 is the square root of 496 345 612 324.
The multiples of 704 518 are all integers evenly divisible by 704 518, that is all numbers such that the remainder of the division by 704 518 is zero. There are infinitely many multiples of 704 518. The smallest multiples of 704 518 are: