It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 509 367 is not a prime number.
For example, 138 509 367 can be divided by 3: 138 509 367 / 3 = 46 169 789.
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For 138 509 367 to be a prime number, it would have been required that 138 509 367 has only two divisors, i.e., itself and 1.
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138 509 367 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 138 509 367 is about 11 769.000.
Thus, the square root of 138 509 367 is not an integer, and therefore 138 509 367 is not a square number.
The square of a number (here 138 509 367) is the result of the product of this number (138 509 367) by itself (i.e., 138 509 367 × 138 509 367); the square of 138 509 367 is sometimes called "raising 138 509 367 to the power 2", or "138 509 367 squared".
The square of 138 509 367 is 19 184 844 746 740 688 because 138 509 367 × 138 509 367 = 138 509 3672 = 19 184 844 746 740 688.
As a consequence, 138 509 367 is the square root of 19 184 844 746 740 688.
138 509 367 is a number with 9 digits.
The multiples of 138 509 367 are all integers evenly divisible by 138 509 367, that is all numbers such that the remainder of the division by 138 509 367 is zero. There are infinitely many multiples of 138 509 367. The smallest multiples of 138 509 367 are: