It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 998 001 001 is not a prime number.
For example, 998 001 001 can be divided by 1 129: 998 001 001 / 1129 = 883 969.
For 998 001 001 to be a prime number, it would have been required that 998 001 001 has only two divisors, i.e., itself and 1.
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998 001 001 is an odd number, because it is not evenly divisible by 2.
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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 998 001 001 is about 31 591.154.
Thus, the square root of 998 001 001 is not an integer, and therefore 998 001 001 is not a square number.
The square of a number (here 998 001 001) is the result of the product of this number (998 001 001) by itself (i.e., 998 001 001 × 998 001 001); the square of 998 001 001 is sometimes called "raising 998 001 001 to the power 2", or "998 001 001 squared".
The square of 998 001 001 is 996 005 997 997 001 984 because 998 001 001 × 998 001 001 = 998 001 0012 = 996 005 997 997 001 984.
As a consequence, 998 001 001 is the square root of 996 005 997 997 001 984.
998 001 001 is a number with 9 digits.
The multiples of 998 001 001 are all integers evenly divisible by 998 001 001, that is all numbers such that the remainder of the division by 998 001 001 is zero. There are infinitely many multiples of 998 001 001. The smallest multiples of 998 001 001 are: