It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 598 998 is not a prime number.
For example, 598 998 can be divided by 2: 598 998 / 2 = 299 499.
For 598 998 to be a prime number, it would have been required that 598 998 has only two divisors, i.e., itself and 1.
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598 998 is an even number, because it is evenly divisible by 2: 598 998 / 2 = 299 499.
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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 598 998 is about 773.950.
Thus, the square root of 598 998 is not an integer, and therefore 598 998 is not a square number.
The square of a number (here 598 998) is the result of the product of this number (598 998) by itself (i.e., 598 998 × 598 998); the square of 598 998 is sometimes called "raising 598 998 to the power 2", or "598 998 squared".
The square of 598 998 is 358 798 604 004 because 598 998 × 598 998 = 598 9982 = 358 798 604 004.
As a consequence, 598 998 is the square root of 358 798 604 004.
The multiples of 598 998 are all integers evenly divisible by 598 998, that is all numbers such that the remainder of the division by 598 998 is zero. There are infinitely many multiples of 598 998. The smallest multiples of 598 998 are: