It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 297 991 988 is not a prime number.
For example, 297 991 988 can be divided by 2: 297 991 988 / 2 = 148 995 994.
For 297 991 988 to be a prime number, it would have been required that 297 991 988 has only two divisors, i.e., itself and 1.
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297 991 988 is an even number, because it is evenly divisible by 2: 297 991 988 / 2 = 148 995 994.
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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 297 991 988 is about 17 262.444.
Thus, the square root of 297 991 988 is not an integer, and therefore 297 991 988 is not a square number.
The square of a number (here 297 991 988) is the result of the product of this number (297 991 988) by itself (i.e., 297 991 988 × 297 991 988); the square of 297 991 988 is sometimes called "raising 297 991 988 to the power 2", or "297 991 988 squared".
The square of 297 991 988 is 88 799 224 912 192 144 because 297 991 988 × 297 991 988 = 297 991 9882 = 88 799 224 912 192 144.
As a consequence, 297 991 988 is the square root of 88 799 224 912 192 144.
297 991 988 is a number with 9 digits.
The multiples of 297 991 988 are all integers evenly divisible by 297 991 988, that is all numbers such that the remainder of the division by 297 991 988 is zero. There are infinitely many multiples of 297 991 988. The smallest multiples of 297 991 988 are: