It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 000 998 is not a prime number.
For example, 998 000 998 can be divided by 2: 998 000 998 / 2 = 499 000 499.
For 998 000 998 to be a prime number, it would have been required that 998 000 998 has only two divisors, i.e., itself and 1.
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998 000 998 is an even number, because it is evenly divisible by 2: 998 000 998 / 2 = 499 000 499.
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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 998 000 998 is about 31 591.154.
Thus, the square root of 998 000 998 is not an integer, and therefore 998 000 998 is not a square number.
The square of a number (here 998 000 998) is the result of the product of this number (998 000 998) by itself (i.e., 998 000 998 × 998 000 998); the square of 998 000 998 is sometimes called "raising 998 000 998 to the power 2", or "998 000 998 squared".
The square of 998 000 998 is 996 005 992 008 995 968 because 998 000 998 × 998 000 998 = 998 000 9982 = 996 005 992 008 995 968.
As a consequence, 998 000 998 is the square root of 996 005 992 008 995 968.
998 000 998 is a number with 9 digits.
The multiples of 998 000 998 are all integers evenly divisible by 998 000 998, that is all numbers such that the remainder of the division by 998 000 998 is zero. There are infinitely many multiples of 998 000 998. The smallest multiples of 998 000 998 are: