It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 704 398 is not a prime number.
For example, 704 398 can be divided by 2: 704 398 / 2 = 352 199.
For 704 398 to be a prime number, it would have been required that 704 398 has only two divisors, i.e., itself and 1.
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704 398 is an even number, because it is evenly divisible by 2: 704 398 / 2 = 352 199.
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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 704 398 is about 839.284.
Thus, the square root of 704 398 is not an integer, and therefore 704 398 is not a square number.
The square of a number (here 704 398) is the result of the product of this number (704 398) by itself (i.e., 704 398 × 704 398); the square of 704 398 is sometimes called "raising 704 398 to the power 2", or "704 398 squared".
The square of 704 398 is 496 176 542 404 because 704 398 × 704 398 = 704 3982 = 496 176 542 404.
As a consequence, 704 398 is the square root of 496 176 542 404.
The multiples of 704 398 are all integers evenly divisible by 704 398, that is all numbers such that the remainder of the division by 704 398 is zero. There are infinitely many multiples of 704 398. The smallest multiples of 704 398 are: