It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 676 is not a prime number.
For example, 513 676 can be divided by 2: 513 676 / 2 = 256 838.
For 513 676 to be a prime number, it would have been required that 513 676 has only two divisors, i.e., itself and 1.
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513 676 is an even number, because it is evenly divisible by 2: 513 676 / 2 = 256 838.
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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 513 676 is about 716.712.
Thus, the square root of 513 676 is not an integer, and therefore 513 676 is not a square number.
The square of a number (here 513 676) is the result of the product of this number (513 676) by itself (i.e., 513 676 × 513 676); the square of 513 676 is sometimes called "raising 513 676 to the power 2", or "513 676 squared".
The square of 513 676 is 263 863 032 976 because 513 676 × 513 676 = 513 6762 = 263 863 032 976.
As a consequence, 513 676 is the square root of 263 863 032 976.
The multiples of 513 676 are all integers evenly divisible by 513 676, that is all numbers such that the remainder of the division by 513 676 is zero. There are infinitely many multiples of 513 676. The smallest multiples of 513 676 are: