It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 129 627 742 is not a prime number.
For example, 129 627 742 can be divided by 2: 129 627 742 / 2 = 64 813 871.
For 129 627 742 to be a prime number, it would have been required that 129 627 742 has only two divisors, i.e., itself and 1.
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129 627 742 is an even number, because it is evenly divisible by 2: 129 627 742 / 2 = 64 813 871.
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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 129 627 742 is about 11 385.418.
Thus, the square root of 129 627 742 is not an integer, and therefore 129 627 742 is not a square number.
The square of a number (here 129 627 742) is the result of the product of this number (129 627 742) by itself (i.e., 129 627 742 × 129 627 742); the square of 129 627 742 is sometimes called "raising 129 627 742 to the power 2", or "129 627 742 squared".
The square of 129 627 742 is 16 803 351 496 018 564 because 129 627 742 × 129 627 742 = 129 627 7422 = 16 803 351 496 018 564.
As a consequence, 129 627 742 is the square root of 16 803 351 496 018 564.
129 627 742 is a number with 9 digits.
The multiples of 129 627 742 are all integers evenly divisible by 129 627 742, that is all numbers such that the remainder of the division by 129 627 742 is zero. There are infinitely many multiples of 129 627 742. The smallest multiples of 129 627 742 are: