It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 129 137 is not a prime number.
For example, 129 137 can be divided by 29: 129 137 / 29 = 4 453.
For 129 137 to be a prime number, it would have been required that 129 137 has only two divisors, i.e., itself and 1.
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129 137 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 129 137 is about 359.356.
Thus, the square root of 129 137 is not an integer, and therefore 129 137 is not a square number.
The square of a number (here 129 137) is the result of the product of this number (129 137) by itself (i.e., 129 137 × 129 137); the square of 129 137 is sometimes called "raising 129 137 to the power 2", or "129 137 squared".
The square of 129 137 is 16 676 364 769 because 129 137 × 129 137 = 129 1372 = 16 676 364 769.
As a consequence, 129 137 is the square root of 16 676 364 769.
The multiples of 129 137 are all integers evenly divisible by 129 137, that is all numbers such that the remainder of the division by 129 137 is zero. There are infinitely many multiples of 129 137. The smallest multiples of 129 137 are: