It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 676 is not a prime number.
For example, 998 676 can be divided by 2: 998 676 / 2 = 499 338.
For 998 676 to be a prime number, it would have been required that 998 676 has only two divisors, i.e., itself and 1.
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998 676 is an even number, because it is evenly divisible by 2: 998 676 / 2 = 499 338.
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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 998 676 is about 999.338.
Thus, the square root of 998 676 is not an integer, and therefore 998 676 is not a square number.
The square of a number (here 998 676) is the result of the product of this number (998 676) by itself (i.e., 998 676 × 998 676); the square of 998 676 is sometimes called "raising 998 676 to the power 2", or "998 676 squared".
The square of 998 676 is 997 353 752 976 because 998 676 × 998 676 = 998 6762 = 997 353 752 976.
As a consequence, 998 676 is the square root of 997 353 752 976.
The multiples of 998 676 are all integers evenly divisible by 998 676, that is all numbers such that the remainder of the division by 998 676 is zero. There are infinitely many multiples of 998 676. The smallest multiples of 998 676 are: