It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 473 is not a prime number.
For example, 491 473 can be divided by 19: 491 473 / 19 = 25 867.
For 491 473 to be a prime number, it would have been required that 491 473 has only two divisors, i.e., itself and 1.
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491 473 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 491 473 is about 701.051.
Thus, the square root of 491 473 is not an integer, and therefore 491 473 is not a square number.
The square of a number (here 491 473) is the result of the product of this number (491 473) by itself (i.e., 491 473 × 491 473); the square of 491 473 is sometimes called "raising 491 473 to the power 2", or "491 473 squared".
The square of 491 473 is 241 545 709 729 because 491 473 × 491 473 = 491 4732 = 241 545 709 729.
As a consequence, 491 473 is the square root of 241 545 709 729.
The multiples of 491 473 are all integers evenly divisible by 491 473, that is all numbers such that the remainder of the division by 491 473 is zero. There are infinitely many multiples of 491 473. The smallest multiples of 491 473 are: