It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 711 is not a prime number.
For example, 491 711 can be divided by 11: 491 711 / 11 = 44 701.
For 491 711 to be a prime number, it would have been required that 491 711 has only two divisors, i.e., itself and 1.
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491 711 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 491 711 is about 701.221.
Thus, the square root of 491 711 is not an integer, and therefore 491 711 is not a square number.
The square of a number (here 491 711) is the result of the product of this number (491 711) by itself (i.e., 491 711 × 491 711); the square of 491 711 is sometimes called "raising 491 711 to the power 2", or "491 711 squared".
The square of 491 711 is 241 779 707 521 because 491 711 × 491 711 = 491 7112 = 241 779 707 521.
As a consequence, 491 711 is the square root of 241 779 707 521.
The multiples of 491 711 are all integers evenly divisible by 491 711, that is all numbers such that the remainder of the division by 491 711 is zero. There are infinitely many multiples of 491 711. The smallest multiples of 491 711 are: