It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 131 987 is not a prime number.
For example, 131 987 can be divided by 89: 131 987 / 89 = 1 483.
For 131 987 to be a prime number, it would have been required that 131 987 has only two divisors, i.e., itself and 1.
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131 987 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 131 987 is about 363.300.
Thus, the square root of 131 987 is not an integer, and therefore 131 987 is not a square number.
The square of a number (here 131 987) is the result of the product of this number (131 987) by itself (i.e., 131 987 × 131 987); the square of 131 987 is sometimes called "raising 131 987 to the power 2", or "131 987 squared".
The square of 131 987 is 17 420 568 169 because 131 987 × 131 987 = 131 9872 = 17 420 568 169.
As a consequence, 131 987 is the square root of 17 420 568 169.
The multiples of 131 987 are all integers evenly divisible by 131 987, that is all numbers such that the remainder of the division by 131 987 is zero. There are infinitely many multiples of 131 987. The smallest multiples of 131 987 are: