It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 958 is not a prime number.
For example, 998 958 can be divided by 2: 998 958 / 2 = 499 479.
For 998 958 to be a prime number, it would have been required that 998 958 has only two divisors, i.e., itself and 1.
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998 958 is an even number, because it is evenly divisible by 2: 998 958 / 2 = 499 479.
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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 998 958 is about 999.479.
Thus, the square root of 998 958 is not an integer, and therefore 998 958 is not a square number.
The square of a number (here 998 958) is the result of the product of this number (998 958) by itself (i.e., 998 958 × 998 958); the square of 998 958 is sometimes called "raising 998 958 to the power 2", or "998 958 squared".
The square of 998 958 is 997 917 085 764 because 998 958 × 998 958 = 998 9582 = 997 917 085 764.
As a consequence, 998 958 is the square root of 997 917 085 764.
The multiples of 998 958 are all integers evenly divisible by 998 958, that is all numbers such that the remainder of the division by 998 958 is zero. There are infinitely many multiples of 998 958. The smallest multiples of 998 958 are: