It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 8 602 489 is not a prime number.
For example, 8 602 489 can be divided by 7: 8 602 489 / 7 = 1 228 927.
For 8 602 489 to be a prime number, it would have been required that 8 602 489 has only two divisors, i.e., itself and 1.
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8 602 489 is an odd number, because it is not evenly divisible by 2.
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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 8 602 489 is 2 933.
Therefore, the square root of 8 602 489 is an integer, and as a consequence 8 602 489 is a perfect square.
The square of a number (here 8 602 489) is the result of the product of this number (8 602 489) by itself (i.e., 8 602 489 × 8 602 489); the square of 8 602 489 is sometimes called "raising 8 602 489 to the power 2", or "8 602 489 squared".
The square of 8 602 489 is 74 002 816 995 121 because 8 602 489 × 8 602 489 = 8 602 4892 = 74 002 816 995 121.
As a consequence, 8 602 489 is the square root of 74 002 816 995 121.
The multiples of 8 602 489 are all integers evenly divisible by 8 602 489, that is all numbers such that the remainder of the division by 8 602 489 is zero. There are infinitely many multiples of 8 602 489. The smallest multiples of 8 602 489 are: