It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 340 998 is not a prime number.
For example, 340 998 can be divided by 2: 340 998 / 2 = 170 499.
For 340 998 to be a prime number, it would have been required that 340 998 has only two divisors, i.e., itself and 1.
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340 998 is an even number, because it is evenly divisible by 2: 340 998 / 2 = 170 499.
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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 340 998 is about 583.950.
Thus, the square root of 340 998 is not an integer, and therefore 340 998 is not a square number.
The square of a number (here 340 998) is the result of the product of this number (340 998) by itself (i.e., 340 998 × 340 998); the square of 340 998 is sometimes called "raising 340 998 to the power 2", or "340 998 squared".
The square of 340 998 is 116 279 636 004 because 340 998 × 340 998 = 340 9982 = 116 279 636 004.
As a consequence, 340 998 is the square root of 116 279 636 004.
The multiples of 340 998 are all integers evenly divisible by 340 998, that is all numbers such that the remainder of the division by 340 998 is zero. There are infinitely many multiples of 340 998. The smallest multiples of 340 998 are: