It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 118 309 is not a prime number.
For example, 118 309 can be divided by 193: 118 309 / 193 = 613.
For 118 309 to be a prime number, it would have been required that 118 309 has only two divisors, i.e., itself and 1.
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118 309 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 118 309 is about 343.961.
Thus, the square root of 118 309 is not an integer, and therefore 118 309 is not a square number.
The square of a number (here 118 309) is the result of the product of this number (118 309) by itself (i.e., 118 309 × 118 309); the square of 118 309 is sometimes called "raising 118 309 to the power 2", or "118 309 squared".
The square of 118 309 is 13 997 019 481 because 118 309 × 118 309 = 118 3092 = 13 997 019 481.
As a consequence, 118 309 is the square root of 13 997 019 481.
The multiples of 118 309 are all integers evenly divisible by 118 309, that is all numbers such that the remainder of the division by 118 309 is zero. There are infinitely many multiples of 118 309. The smallest multiples of 118 309 are: