It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 159 009 is not a prime number.
For example, 159 009 can be divided by 3: 159 009 / 3 = 53 003.
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For 159 009 to be a prime number, it would have been required that 159 009 has only two divisors, i.e., itself and 1.
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159 009 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 159 009 is about 398.759.
Thus, the square root of 159 009 is not an integer, and therefore 159 009 is not a square number.
The square of a number (here 159 009) is the result of the product of this number (159 009) by itself (i.e., 159 009 × 159 009); the square of 159 009 is sometimes called "raising 159 009 to the power 2", or "159 009 squared".
The square of 159 009 is 25 283 862 081 because 159 009 × 159 009 = 159 0092 = 25 283 862 081.
As a consequence, 159 009 is the square root of 25 283 862 081.
The multiples of 159 009 are all integers evenly divisible by 159 009, that is all numbers such that the remainder of the division by 159 009 is zero. There are infinitely many multiples of 159 009. The smallest multiples of 159 009 are: