It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 339 998 is not a prime number.
For example, 339 998 can be divided by 2: 339 998 / 2 = 169 999.
For 339 998 to be a prime number, it would have been required that 339 998 has only two divisors, i.e., itself and 1.
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339 998 is an even number, because it is evenly divisible by 2: 339 998 / 2 = 169 999.
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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 339 998 is about 583.093.
Thus, the square root of 339 998 is not an integer, and therefore 339 998 is not a square number.
The square of a number (here 339 998) is the result of the product of this number (339 998) by itself (i.e., 339 998 × 339 998); the square of 339 998 is sometimes called "raising 339 998 to the power 2", or "339 998 squared".
The square of 339 998 is 115 598 640 004 because 339 998 × 339 998 = 339 9982 = 115 598 640 004.
As a consequence, 339 998 is the square root of 115 598 640 004.
The multiples of 339 998 are all integers evenly divisible by 339 998, that is all numbers such that the remainder of the division by 339 998 is zero. There are infinitely many multiples of 339 998. The smallest multiples of 339 998 are: