It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 998 is not a prime number.
For example, 489 998 can be divided by 2: 489 998 / 2 = 244 999.
For 489 998 to be a prime number, it would have been required that 489 998 has only two divisors, i.e., itself and 1.
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489 998 is an even number, because it is evenly divisible by 2: 489 998 / 2 = 244 999.
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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 489 998 is about 699.999.
Thus, the square root of 489 998 is not an integer, and therefore 489 998 is not a square number.
The square of a number (here 489 998) is the result of the product of this number (489 998) by itself (i.e., 489 998 × 489 998); the square of 489 998 is sometimes called "raising 489 998 to the power 2", or "489 998 squared".
The square of 489 998 is 240 098 040 004 because 489 998 × 489 998 = 489 9982 = 240 098 040 004.
As a consequence, 489 998 is the square root of 240 098 040 004.
The multiples of 489 998 are all integers evenly divisible by 489 998, that is all numbers such that the remainder of the division by 489 998 is zero. There are infinitely many multiples of 489 998. The smallest multiples of 489 998 are: