It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 509 795 994 is not a prime number.
For example, 509 795 994 can be divided by 2: 509 795 994 / 2 = 254 897 997.
For 509 795 994 to be a prime number, it would have been required that 509 795 994 has only two divisors, i.e., itself and 1.
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509 795 994 is an even number, because it is evenly divisible by 2: 509 795 994 / 2 = 254 897 997.
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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 509 795 994 is about 22 578.662.
Thus, the square root of 509 795 994 is not an integer, and therefore 509 795 994 is not a square number.
The square of a number (here 509 795 994) is the result of the product of this number (509 795 994) by itself (i.e., 509 795 994 × 509 795 994); the square of 509 795 994 is sometimes called "raising 509 795 994 to the power 2", or "509 795 994 squared".
The square of 509 795 994 is 259 891 955 498 448 032 because 509 795 994 × 509 795 994 = 509 795 9942 = 259 891 955 498 448 032.
As a consequence, 509 795 994 is the square root of 259 891 955 498 448 032.
509 795 994 is a number with 9 digits.
The multiples of 509 795 994 are all integers evenly divisible by 509 795 994, that is all numbers such that the remainder of the division by 509 795 994 is zero. There are infinitely many multiples of 509 795 994. The smallest multiples of 509 795 994 are: