It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 908 978 is not a prime number.
For example, 120 908 978 can be divided by 2: 120 908 978 / 2 = 60 454 489.
For 120 908 978 to be a prime number, it would have been required that 120 908 978 has only two divisors, i.e., itself and 1.
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120 908 978 is an even number, because it is evenly divisible by 2: 120 908 978 / 2 = 60 454 489.
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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 120 908 978 is about 10 995.862.
Thus, the square root of 120 908 978 is not an integer, and therefore 120 908 978 is not a square number.
The square of a number (here 120 908 978) is the result of the product of this number (120 908 978) by itself (i.e., 120 908 978 × 120 908 978); the square of 120 908 978 is sometimes called "raising 120 908 978 to the power 2", or "120 908 978 squared".
The square of 120 908 978 is 14 618 980 961 004 484 because 120 908 978 × 120 908 978 = 120 908 9782 = 14 618 980 961 004 484.
As a consequence, 120 908 978 is the square root of 14 618 980 961 004 484.
120 908 978 is a number with 9 digits.
The multiples of 120 908 978 are all integers evenly divisible by 120 908 978, that is all numbers such that the remainder of the division by 120 908 978 is zero. There are infinitely many multiples of 120 908 978. The smallest multiples of 120 908 978 are: