It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 5 609 is not a prime number.
For example, 5 609 can be divided by 71: 5 609 / 71 = 79.
For 5 609 to be a prime number, it would have been required that 5 609 has only two divisors, i.e., itself and 1.
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5 609 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 5 609 is about 74.893.
Thus, the square root of 5 609 is not an integer, and therefore 5 609 is not a square number.
The square of a number (here 5 609) is the result of the product of this number (5 609) by itself (i.e., 5 609 × 5 609); the square of 5 609 is sometimes called "raising 5 609 to the power 2", or "5 609 squared".
The square of 5 609 is 31 460 881 because 5 609 × 5 609 = 5 6092 = 31 460 881.
As a consequence, 5 609 is the square root of 31 460 881.
The multiples of 5 609 are all integers evenly divisible by 5 609, that is all numbers such that the remainder of the division by 5 609 is zero. There are infinitely many multiples of 5 609. The smallest multiples of 5 609 are: