It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 351 609 is not a prime number.
For example, 138 351 609 can be divided by 3: 138 351 609 / 3 = 46 117 203.
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For 138 351 609 to be a prime number, it would have been required that 138 351 609 has only two divisors, i.e., itself and 1.
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138 351 609 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 138 351 609 is about 11 762.296.
Thus, the square root of 138 351 609 is not an integer, and therefore 138 351 609 is not a square number.
The square of a number (here 138 351 609) is the result of the product of this number (138 351 609) by itself (i.e., 138 351 609 × 138 351 609); the square of 138 351 609 is sometimes called "raising 138 351 609 to the power 2", or "138 351 609 squared".
The square of 138 351 609 is 19 141 167 712 888 880 because 138 351 609 × 138 351 609 = 138 351 6092 = 19 141 167 712 888 880.
As a consequence, 138 351 609 is the square root of 19 141 167 712 888 880.
138 351 609 is a number with 9 digits.
The multiples of 138 351 609 are all integers evenly divisible by 138 351 609, that is all numbers such that the remainder of the division by 138 351 609 is zero. There are infinitely many multiples of 138 351 609. The smallest multiples of 138 351 609 are: