It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 702 398 is not a prime number.
For example, 702 398 can be divided by 2: 702 398 / 2 = 351 199.
For 702 398 to be a prime number, it would have been required that 702 398 has only two divisors, i.e., itself and 1.
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702 398 is an even number, because it is evenly divisible by 2: 702 398 / 2 = 351 199.
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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 702 398 is about 838.092.
Thus, the square root of 702 398 is not an integer, and therefore 702 398 is not a square number.
The square of a number (here 702 398) is the result of the product of this number (702 398) by itself (i.e., 702 398 × 702 398); the square of 702 398 is sometimes called "raising 702 398 to the power 2", or "702 398 squared".
The square of 702 398 is 493 362 950 404 because 702 398 × 702 398 = 702 3982 = 493 362 950 404.
As a consequence, 702 398 is the square root of 493 362 950 404.
The multiples of 702 398 are all integers evenly divisible by 702 398, that is all numbers such that the remainder of the division by 702 398 is zero. There are infinitely many multiples of 702 398. The smallest multiples of 702 398 are: