It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 493 018 is not a prime number.
For example, 493 018 can be divided by 2: 493 018 / 2 = 246 509.
For 493 018 to be a prime number, it would have been required that 493 018 has only two divisors, i.e., itself and 1.
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493 018 is an even number, because it is evenly divisible by 2: 493 018 / 2 = 246 509.
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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 493 018 is about 702.152.
Thus, the square root of 493 018 is not an integer, and therefore 493 018 is not a square number.
The square of a number (here 493 018) is the result of the product of this number (493 018) by itself (i.e., 493 018 × 493 018); the square of 493 018 is sometimes called "raising 493 018 to the power 2", or "493 018 squared".
The square of 493 018 is 243 066 748 324 because 493 018 × 493 018 = 493 0182 = 243 066 748 324.
As a consequence, 493 018 is the square root of 243 066 748 324.
The multiples of 493 018 are all integers evenly divisible by 493 018, that is all numbers such that the remainder of the division by 493 018 is zero. There are infinitely many multiples of 493 018. The smallest multiples of 493 018 are: