It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 489 674 is not a prime number.
For example, 489 674 can be divided by 2: 489 674 / 2 = 244 837.
For 489 674 to be a prime number, it would have been required that 489 674 has only two divisors, i.e., itself and 1.
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489 674 is an even number, because it is evenly divisible by 2: 489 674 / 2 = 244 837.
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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 489 674 is about 699.767.
Thus, the square root of 489 674 is not an integer, and therefore 489 674 is not a square number.
The square of a number (here 489 674) is the result of the product of this number (489 674) by itself (i.e., 489 674 × 489 674); the square of 489 674 is sometimes called "raising 489 674 to the power 2", or "489 674 squared".
The square of 489 674 is 239 780 626 276 because 489 674 × 489 674 = 489 6742 = 239 780 626 276.
As a consequence, 489 674 is the square root of 239 780 626 276.
The multiples of 489 674 are all integers evenly divisible by 489 674, that is all numbers such that the remainder of the division by 489 674 is zero. There are infinitely many multiples of 489 674. The smallest multiples of 489 674 are: