It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 498 998 is not a prime number.
For example, 498 998 can be divided by 2: 498 998 / 2 = 249 499.
For 498 998 to be a prime number, it would have been required that 498 998 has only two divisors, i.e., itself and 1.
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498 998 is an even number, because it is evenly divisible by 2: 498 998 / 2 = 249 499.
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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 498 998 is about 706.398.
Thus, the square root of 498 998 is not an integer, and therefore 498 998 is not a square number.
The square of a number (here 498 998) is the result of the product of this number (498 998) by itself (i.e., 498 998 × 498 998); the square of 498 998 is sometimes called "raising 498 998 to the power 2", or "498 998 squared".
The square of 498 998 is 248 999 004 004 because 498 998 × 498 998 = 498 9982 = 248 999 004 004.
As a consequence, 498 998 is the square root of 248 999 004 004.
The multiples of 498 998 are all integers evenly divisible by 498 998, that is all numbers such that the remainder of the division by 498 998 is zero. There are infinitely many multiples of 498 998. The smallest multiples of 498 998 are: