It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 564 is not a prime number.
For example, 489 564 can be divided by 2: 489 564 / 2 = 244 782.
For 489 564 to be a prime number, it would have been required that 489 564 has only two divisors, i.e., itself and 1.
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489 564 is an even number, because it is evenly divisible by 2: 489 564 / 2 = 244 782.
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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 489 564 is about 699.689.
Thus, the square root of 489 564 is not an integer, and therefore 489 564 is not a square number.
The square of a number (here 489 564) is the result of the product of this number (489 564) by itself (i.e., 489 564 × 489 564); the square of 489 564 is sometimes called "raising 489 564 to the power 2", or "489 564 squared".
The square of 489 564 is 239 672 910 096 because 489 564 × 489 564 = 489 5642 = 239 672 910 096.
As a consequence, 489 564 is the square root of 239 672 910 096.
The multiples of 489 564 are all integers evenly divisible by 489 564, that is all numbers such that the remainder of the division by 489 564 is zero. There are infinitely many multiples of 489 564. The smallest multiples of 489 564 are: