It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 5 388 637 is not a prime number.
For example, 5 388 637 can be divided by 31: 5 388 637 / 31 = 173 827.
For 5 388 637 to be a prime number, it would have been required that 5 388 637 has only two divisors, i.e., itself and 1.
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5 388 637 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 5 388 637 is about 2 321.344.
Thus, the square root of 5 388 637 is not an integer, and therefore 5 388 637 is not a square number.
The square of a number (here 5 388 637) is the result of the product of this number (5 388 637) by itself (i.e., 5 388 637 × 5 388 637); the square of 5 388 637 is sometimes called "raising 5 388 637 to the power 2", or "5 388 637 squared".
The square of 5 388 637 is 29 037 408 717 769 because 5 388 637 × 5 388 637 = 5 388 6372 = 29 037 408 717 769.
As a consequence, 5 388 637 is the square root of 29 037 408 717 769.
The multiples of 5 388 637 are all integers evenly divisible by 5 388 637, that is all numbers such that the remainder of the division by 5 388 637 is zero. There are infinitely many multiples of 5 388 637. The smallest multiples of 5 388 637 are: