It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 2 397 997 is not a prime number.
For example, 2 397 997 can be divided by 7: 2 397 997 / 7 = 342 571.
For 2 397 997 to be a prime number, it would have been required that 2 397 997 has only two divisors, i.e., itself and 1.
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2 397 997 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 2 397 997 is about 1 548.547.
Thus, the square root of 2 397 997 is not an integer, and therefore 2 397 997 is not a square number.
The square of a number (here 2 397 997) is the result of the product of this number (2 397 997) by itself (i.e., 2 397 997 × 2 397 997); the square of 2 397 997 is sometimes called "raising 2 397 997 to the power 2", or "2 397 997 squared".
The square of 2 397 997 is 5 750 389 612 009 because 2 397 997 × 2 397 997 = 2 397 9972 = 5 750 389 612 009.
As a consequence, 2 397 997 is the square root of 5 750 389 612 009.
The multiples of 2 397 997 are all integers evenly divisible by 2 397 997, that is all numbers such that the remainder of the division by 2 397 997 is zero. There are infinitely many multiples of 2 397 997. The smallest multiples of 2 397 997 are: