It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 609 909 is not a prime number.
For example, 120 609 909 can be divided by 3: 120 609 909 / 3 = 40 203 303.
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For 120 609 909 to be a prime number, it would have been required that 120 609 909 has only two divisors, i.e., itself and 1.
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120 609 909 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 120 609 909 is about 10 982.254.
Thus, the square root of 120 609 909 is not an integer, and therefore 120 609 909 is not a square number.
The square of a number (here 120 609 909) is the result of the product of this number (120 609 909) by itself (i.e., 120 609 909 × 120 609 909); the square of 120 609 909 is sometimes called "raising 120 609 909 to the power 2", or "120 609 909 squared".
The square of 120 609 909 is 14 546 750 148 988 280 because 120 609 909 × 120 609 909 = 120 609 9092 = 14 546 750 148 988 280.
As a consequence, 120 609 909 is the square root of 14 546 750 148 988 280.
120 609 909 is a number with 9 digits.
The multiples of 120 609 909 are all integers evenly divisible by 120 609 909, that is all numbers such that the remainder of the division by 120 609 909 is zero. There are infinitely many multiples of 120 609 909. The smallest multiples of 120 609 909 are: