It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 137 238 978 is not a prime number.
For example, 137 238 978 can be divided by 2: 137 238 978 / 2 = 68 619 489.
For 137 238 978 to be a prime number, it would have been required that 137 238 978 has only two divisors, i.e., itself and 1.
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137 238 978 is an even number, because it is evenly divisible by 2: 137 238 978 / 2 = 68 619 489.
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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 137 238 978 is about 11 714.904.
Thus, the square root of 137 238 978 is not an integer, and therefore 137 238 978 is not a square number.
The square of a number (here 137 238 978) is the result of the product of this number (137 238 978) by itself (i.e., 137 238 978 × 137 238 978); the square of 137 238 978 is sometimes called "raising 137 238 978 to the power 2", or "137 238 978 squared".
The square of 137 238 978 is 18 834 537 082 484 484 because 137 238 978 × 137 238 978 = 137 238 9782 = 18 834 537 082 484 484.
As a consequence, 137 238 978 is the square root of 18 834 537 082 484 484.
137 238 978 is a number with 9 digits.
The multiples of 137 238 978 are all integers evenly divisible by 137 238 978, that is all numbers such that the remainder of the division by 137 238 978 is zero. There are infinitely many multiples of 137 238 978. The smallest multiples of 137 238 978 are: