It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 494 is not a prime number.
For example, 489 494 can be divided by 2: 489 494 / 2 = 244 747.
For 489 494 to be a prime number, it would have been required that 489 494 has only two divisors, i.e., itself and 1.
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489 494 is an even number, because it is evenly divisible by 2: 489 494 / 2 = 244 747.
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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 489 494 is about 699.638.
Thus, the square root of 489 494 is not an integer, and therefore 489 494 is not a square number.
The square of a number (here 489 494) is the result of the product of this number (489 494) by itself (i.e., 489 494 × 489 494); the square of 489 494 is sometimes called "raising 489 494 to the power 2", or "489 494 squared".
The square of 489 494 is 239 604 376 036 because 489 494 × 489 494 = 489 4942 = 239 604 376 036.
As a consequence, 489 494 is the square root of 239 604 376 036.
The multiples of 489 494 are all integers evenly divisible by 489 494, that is all numbers such that the remainder of the division by 489 494 is zero. There are infinitely many multiples of 489 494. The smallest multiples of 489 494 are: