It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 118 998 is not a prime number.
For example, 397 118 998 can be divided by 2: 397 118 998 / 2 = 198 559 499.
For 397 118 998 to be a prime number, it would have been required that 397 118 998 has only two divisors, i.e., itself and 1.
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397 118 998 is an even number, because it is evenly divisible by 2: 397 118 998 / 2 = 198 559 499.
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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 397 118 998 is about 19 927.845.
Thus, the square root of 397 118 998 is not an integer, and therefore 397 118 998 is not a square number.
The square of a number (here 397 118 998) is the result of the product of this number (397 118 998) by itself (i.e., 397 118 998 × 397 118 998); the square of 397 118 998 is sometimes called "raising 397 118 998 to the power 2", or "397 118 998 squared".
The square of 397 118 998 is 157 703 498 572 524 000 because 397 118 998 × 397 118 998 = 397 118 9982 = 157 703 498 572 524 000.
As a consequence, 397 118 998 is the square root of 157 703 498 572 524 000.
397 118 998 is a number with 9 digits.
The multiples of 397 118 998 are all integers evenly divisible by 397 118 998, that is all numbers such that the remainder of the division by 397 118 998 is zero. There are infinitely many multiples of 397 118 998. The smallest multiples of 397 118 998 are: