It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 493 646 is not a prime number.
For example, 493 646 can be divided by 2: 493 646 / 2 = 246 823.
For 493 646 to be a prime number, it would have been required that 493 646 has only two divisors, i.e., itself and 1.
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493 646 is an even number, because it is evenly divisible by 2: 493 646 / 2 = 246 823.
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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 493 646 is about 702.599.
Thus, the square root of 493 646 is not an integer, and therefore 493 646 is not a square number.
The square of a number (here 493 646) is the result of the product of this number (493 646) by itself (i.e., 493 646 × 493 646); the square of 493 646 is sometimes called "raising 493 646 to the power 2", or "493 646 squared".
The square of 493 646 is 243 686 373 316 because 493 646 × 493 646 = 493 6462 = 243 686 373 316.
As a consequence, 493 646 is the square root of 243 686 373 316.
The multiples of 493 646 are all integers evenly divisible by 493 646, that is all numbers such that the remainder of the division by 493 646 is zero. There are infinitely many multiples of 493 646. The smallest multiples of 493 646 are: