It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 488 991 is not a prime number.
For example, 488 991 can be divided by 3: 488 991 / 3 = 162 997.
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For 488 991 to be a prime number, it would have been required that 488 991 has only two divisors, i.e., itself and 1.
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488 991 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 488 991 is about 699.279.
Thus, the square root of 488 991 is not an integer, and therefore 488 991 is not a square number.
The square of a number (here 488 991) is the result of the product of this number (488 991) by itself (i.e., 488 991 × 488 991); the square of 488 991 is sometimes called "raising 488 991 to the power 2", or "488 991 squared".
The square of 488 991 is 239 112 198 081 because 488 991 × 488 991 = 488 9912 = 239 112 198 081.
As a consequence, 488 991 is the square root of 239 112 198 081.
The multiples of 488 991 are all integers evenly divisible by 488 991, that is all numbers such that the remainder of the division by 488 991 is zero. There are infinitely many multiples of 488 991. The smallest multiples of 488 991 are: