It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 16 397 998 is not a prime number.
For example, 16 397 998 can be divided by 2: 16 397 998 / 2 = 8 198 999.
For 16 397 998 to be a prime number, it would have been required that 16 397 998 has only two divisors, i.e., itself and 1.
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16 397 998 is an even number, because it is evenly divisible by 2: 16 397 998 / 2 = 8 198 999.
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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 16 397 998 is about 4 049.444.
Thus, the square root of 16 397 998 is not an integer, and therefore 16 397 998 is not a square number.
The square of a number (here 16 397 998) is the result of the product of this number (16 397 998) by itself (i.e., 16 397 998 × 16 397 998); the square of 16 397 998 is sometimes called "raising 16 397 998 to the power 2", or "16 397 998 squared".
The square of 16 397 998 is 268 894 338 408 004 because 16 397 998 × 16 397 998 = 16 397 9982 = 268 894 338 408 004.
As a consequence, 16 397 998 is the square root of 268 894 338 408 004.
16 397 998 is a number with 8 digits.
The multiples of 16 397 998 are all integers evenly divisible by 16 397 998, that is all numbers such that the remainder of the division by 16 397 998 is zero. There are infinitely many multiples of 16 397 998. The smallest multiples of 16 397 998 are: