It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 518 097 is not a prime number.
For example, 518 097 can be divided by 3: 518 097 / 3 = 172 699.
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For 518 097 to be a prime number, it would have been required that 518 097 has only two divisors, i.e., itself and 1.
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518 097 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 518 097 is about 719.790.
Thus, the square root of 518 097 is not an integer, and therefore 518 097 is not a square number.
The square of a number (here 518 097) is the result of the product of this number (518 097) by itself (i.e., 518 097 × 518 097); the square of 518 097 is sometimes called "raising 518 097 to the power 2", or "518 097 squared".
The square of 518 097 is 268 424 501 409 because 518 097 × 518 097 = 518 0972 = 268 424 501 409.
As a consequence, 518 097 is the square root of 268 424 501 409.
The multiples of 518 097 are all integers evenly divisible by 518 097, that is all numbers such that the remainder of the division by 518 097 is zero. There are infinitely many multiples of 518 097. The smallest multiples of 518 097 are: