It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 487 is not a prime number.
For example, 490 487 can be divided by 73: 490 487 / 73 = 6 719.
For 490 487 to be a prime number, it would have been required that 490 487 has only two divisors, i.e., itself and 1.
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490 487 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 490 487 is about 700.348.
Thus, the square root of 490 487 is not an integer, and therefore 490 487 is not a square number.
The square of a number (here 490 487) is the result of the product of this number (490 487) by itself (i.e., 490 487 × 490 487); the square of 490 487 is sometimes called "raising 490 487 to the power 2", or "490 487 squared".
The square of 490 487 is 240 577 497 169 because 490 487 × 490 487 = 490 4872 = 240 577 497 169.
As a consequence, 490 487 is the square root of 240 577 497 169.
The multiples of 490 487 are all integers evenly divisible by 490 487, that is all numbers such that the remainder of the division by 490 487 is zero. There are infinitely many multiples of 490 487. The smallest multiples of 490 487 are: