It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 17 998 is not a prime number.
For example, 17 998 can be divided by 2: 17 998 / 2 = 8 999.
For 17 998 to be a prime number, it would have been required that 17 998 has only two divisors, i.e., itself and 1.
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17 998 is an even number, because it is evenly divisible by 2: 17 998 / 2 = 8 999.
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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 17 998 is about 134.157.
Thus, the square root of 17 998 is not an integer, and therefore 17 998 is not a square number.
The square of a number (here 17 998) is the result of the product of this number (17 998) by itself (i.e., 17 998 × 17 998); the square of 17 998 is sometimes called "raising 17 998 to the power 2", or "17 998 squared".
The square of 17 998 is 323 928 004 because 17 998 × 17 998 = 17 9982 = 323 928 004.
As a consequence, 17 998 is the square root of 323 928 004.
The multiples of 17 998 are all integers evenly divisible by 17 998, that is all numbers such that the remainder of the division by 17 998 is zero. There are infinitely many multiples of 17 998. The smallest multiples of 17 998 are: