It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 298 998 is not a prime number.
For example, 298 998 can be divided by 2: 298 998 / 2 = 149 499.
For 298 998 to be a prime number, it would have been required that 298 998 has only two divisors, i.e., itself and 1.
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298 998 is an even number, because it is evenly divisible by 2: 298 998 / 2 = 149 499.
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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 298 998 is about 546.807.
Thus, the square root of 298 998 is not an integer, and therefore 298 998 is not a square number.
The square of a number (here 298 998) is the result of the product of this number (298 998) by itself (i.e., 298 998 × 298 998); the square of 298 998 is sometimes called "raising 298 998 to the power 2", or "298 998 squared".
The square of 298 998 is 89 399 804 004 because 298 998 × 298 998 = 298 9982 = 89 399 804 004.
As a consequence, 298 998 is the square root of 89 399 804 004.
The multiples of 298 998 are all integers evenly divisible by 298 998, that is all numbers such that the remainder of the division by 298 998 is zero. There are infinitely many multiples of 298 998. The smallest multiples of 298 998 are: