It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 842 427 is not a prime number.
For example, 138 842 427 can be divided by 3: 138 842 427 / 3 = 46 280 809.
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For 138 842 427 to be a prime number, it would have been required that 138 842 427 has only two divisors, i.e., itself and 1.
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138 842 427 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 138 842 427 is about 11 783.142.
Thus, the square root of 138 842 427 is not an integer, and therefore 138 842 427 is not a square number.
The square of a number (here 138 842 427) is the result of the product of this number (138 842 427) by itself (i.e., 138 842 427 × 138 842 427); the square of 138 842 427 is sometimes called "raising 138 842 427 to the power 2", or "138 842 427 squared".
The square of 138 842 427 is 19 277 219 535 250 328 because 138 842 427 × 138 842 427 = 138 842 4272 = 19 277 219 535 250 328.
As a consequence, 138 842 427 is the square root of 19 277 219 535 250 328.
138 842 427 is a number with 9 digits.
The multiples of 138 842 427 are all integers evenly divisible by 138 842 427, that is all numbers such that the remainder of the division by 138 842 427 is zero. There are infinitely many multiples of 138 842 427. The smallest multiples of 138 842 427 are: