It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 602 is not a prime number.
For example, 998 602 can be divided by 2: 998 602 / 2 = 499 301.
For 998 602 to be a prime number, it would have been required that 998 602 has only two divisors, i.e., itself and 1.
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998 602 is an even number, because it is evenly divisible by 2: 998 602 / 2 = 499 301.
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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 998 602 is about 999.301.
Thus, the square root of 998 602 is not an integer, and therefore 998 602 is not a square number.
The square of a number (here 998 602) is the result of the product of this number (998 602) by itself (i.e., 998 602 × 998 602); the square of 998 602 is sometimes called "raising 998 602 to the power 2", or "998 602 squared".
The square of 998 602 is 997 205 954 404 because 998 602 × 998 602 = 998 6022 = 997 205 954 404.
As a consequence, 998 602 is the square root of 997 205 954 404.
The multiples of 998 602 are all integers evenly divisible by 998 602, that is all numbers such that the remainder of the division by 998 602 is zero. There are infinitely many multiples of 998 602. The smallest multiples of 998 602 are: