It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 494 490 258 is not a prime number.
For example, 494 490 258 can be divided by 2: 494 490 258 / 2 = 247 245 129.
For 494 490 258 to be a prime number, it would have been required that 494 490 258 has only two divisors, i.e., itself and 1.
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494 490 258 is an even number, because it is evenly divisible by 2: 494 490 258 / 2 = 247 245 129.
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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 494 490 258 is about 22 237.137.
Thus, the square root of 494 490 258 is not an integer, and therefore 494 490 258 is not a square number.
The square of a number (here 494 490 258) is the result of the product of this number (494 490 258) by itself (i.e., 494 490 258 × 494 490 258); the square of 494 490 258 is sometimes called "raising 494 490 258 to the power 2", or "494 490 258 squared".
The square of 494 490 258 is 244 520 615 256 906 560 because 494 490 258 × 494 490 258 = 494 490 2582 = 244 520 615 256 906 560.
As a consequence, 494 490 258 is the square root of 244 520 615 256 906 560.
494 490 258 is a number with 9 digits.
The multiples of 494 490 258 are all integers evenly divisible by 494 490 258, that is all numbers such that the remainder of the division by 494 490 258 is zero. There are infinitely many multiples of 494 490 258. The smallest multiples of 494 490 258 are: