It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 488 is not a prime number.
For example, 491 488 can be divided by 2: 491 488 / 2 = 245 744.
For 491 488 to be a prime number, it would have been required that 491 488 has only two divisors, i.e., itself and 1.
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491 488 is an even number, because it is evenly divisible by 2: 491 488 / 2 = 245 744.
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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 491 488 is about 701.062.
Thus, the square root of 491 488 is not an integer, and therefore 491 488 is not a square number.
The square of a number (here 491 488) is the result of the product of this number (491 488) by itself (i.e., 491 488 × 491 488); the square of 491 488 is sometimes called "raising 491 488 to the power 2", or "491 488 squared".
The square of 491 488 is 241 560 454 144 because 491 488 × 491 488 = 491 4882 = 241 560 454 144.
As a consequence, 491 488 is the square root of 241 560 454 144.
The multiples of 491 488 are all integers evenly divisible by 491 488, that is all numbers such that the remainder of the division by 491 488 is zero. There are infinitely many multiples of 491 488. The smallest multiples of 491 488 are: