It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 640 308 is not a prime number.
For example, 491 640 308 can be divided by 2: 491 640 308 / 2 = 245 820 154.
For 491 640 308 to be a prime number, it would have been required that 491 640 308 has only two divisors, i.e., itself and 1.
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491 640 308 is an even number, because it is evenly divisible by 2: 491 640 308 / 2 = 245 820 154.
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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 491 640 308 is about 22 172.963.
Thus, the square root of 491 640 308 is not an integer, and therefore 491 640 308 is not a square number.
The square of a number (here 491 640 308) is the result of the product of this number (491 640 308) by itself (i.e., 491 640 308 × 491 640 308); the square of 491 640 308 is sometimes called "raising 491 640 308 to the power 2", or "491 640 308 squared".
The square of 491 640 308 is 241 710 192 450 334 848 because 491 640 308 × 491 640 308 = 491 640 3082 = 241 710 192 450 334 848.
As a consequence, 491 640 308 is the square root of 241 710 192 450 334 848.
491 640 308 is a number with 9 digits.
The multiples of 491 640 308 are all integers evenly divisible by 491 640 308, that is all numbers such that the remainder of the division by 491 640 308 is zero. There are infinitely many multiples of 491 640 308. The smallest multiples of 491 640 308 are: