It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 495 493 is not a prime number.
For example, 495 493 can be divided by 641: 495 493 / 641 = 773.
For 495 493 to be a prime number, it would have been required that 495 493 has only two divisors, i.e., itself and 1.
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495 493 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 495 493 is about 703.913.
Thus, the square root of 495 493 is not an integer, and therefore 495 493 is not a square number.
The square of a number (here 495 493) is the result of the product of this number (495 493) by itself (i.e., 495 493 × 495 493); the square of 495 493 is sometimes called "raising 495 493 to the power 2", or "495 493 squared".
The square of 495 493 is 245 513 313 049 because 495 493 × 495 493 = 495 4932 = 245 513 313 049.
As a consequence, 495 493 is the square root of 245 513 313 049.
The multiples of 495 493 are all integers evenly divisible by 495 493, that is all numbers such that the remainder of the division by 495 493 is zero. There are infinitely many multiples of 495 493. The smallest multiples of 495 493 are: