It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 118 509 is not a prime number.
For example, 118 509 can be divided by 3: 118 509 / 3 = 39 503.
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For 118 509 to be a prime number, it would have been required that 118 509 has only two divisors, i.e., itself and 1.
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118 509 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 118 509 is about 344.251.
Thus, the square root of 118 509 is not an integer, and therefore 118 509 is not a square number.
The square of a number (here 118 509) is the result of the product of this number (118 509) by itself (i.e., 118 509 × 118 509); the square of 118 509 is sometimes called "raising 118 509 to the power 2", or "118 509 squared".
The square of 118 509 is 14 044 383 081 because 118 509 × 118 509 = 118 5092 = 14 044 383 081.
As a consequence, 118 509 is the square root of 14 044 383 081.
The multiples of 118 509 are all integers evenly divisible by 118 509, that is all numbers such that the remainder of the division by 118 509 is zero. There are infinitely many multiples of 118 509. The smallest multiples of 118 509 are: