It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 311 is not a prime number.
For example, 490 311 can be divided by 3: 490 311 / 3 = 163 437.
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For 490 311 to be a prime number, it would have been required that 490 311 has only two divisors, i.e., itself and 1.
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490 311 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 490 311 is about 700.222.
Thus, the square root of 490 311 is not an integer, and therefore 490 311 is not a square number.
The square of a number (here 490 311) is the result of the product of this number (490 311) by itself (i.e., 490 311 × 490 311); the square of 490 311 is sometimes called "raising 490 311 to the power 2", or "490 311 squared".
The square of 490 311 is 240 404 876 721 because 490 311 × 490 311 = 490 3112 = 240 404 876 721.
As a consequence, 490 311 is the square root of 240 404 876 721.
The multiples of 490 311 are all integers evenly divisible by 490 311, that is all numbers such that the remainder of the division by 490 311 is zero. There are infinitely many multiples of 490 311. The smallest multiples of 490 311 are: