It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 346 is not a prime number.
For example, 998 346 can be divided by 2: 998 346 / 2 = 499 173.
For 998 346 to be a prime number, it would have been required that 998 346 has only two divisors, i.e., itself and 1.
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998 346 is an even number, because it is evenly divisible by 2: 998 346 / 2 = 499 173.
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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 998 346 is about 999.173.
Thus, the square root of 998 346 is not an integer, and therefore 998 346 is not a square number.
The square of a number (here 998 346) is the result of the product of this number (998 346) by itself (i.e., 998 346 × 998 346); the square of 998 346 is sometimes called "raising 998 346 to the power 2", or "998 346 squared".
The square of 998 346 is 996 694 735 716 because 998 346 × 998 346 = 998 3462 = 996 694 735 716.
As a consequence, 998 346 is the square root of 996 694 735 716.
The multiples of 998 346 are all integers evenly divisible by 998 346, that is all numbers such that the remainder of the division by 998 346 is zero. There are infinitely many multiples of 998 346. The smallest multiples of 998 346 are: