It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 298 is not a prime number.
For example, 998 298 can be divided by 2: 998 298 / 2 = 499 149.
For 998 298 to be a prime number, it would have been required that 998 298 has only two divisors, i.e., itself and 1.
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998 298 is an even number, because it is evenly divisible by 2: 998 298 / 2 = 499 149.
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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 998 298 is about 999.149.
Thus, the square root of 998 298 is not an integer, and therefore 998 298 is not a square number.
The square of a number (here 998 298) is the result of the product of this number (998 298) by itself (i.e., 998 298 × 998 298); the square of 998 298 is sometimes called "raising 998 298 to the power 2", or "998 298 squared".
The square of 998 298 is 996 598 896 804 because 998 298 × 998 298 = 998 2982 = 996 598 896 804.
As a consequence, 998 298 is the square root of 996 598 896 804.
The multiples of 998 298 are all integers evenly divisible by 998 298, that is all numbers such that the remainder of the division by 998 298 is zero. There are infinitely many multiples of 998 298. The smallest multiples of 998 298 are: