It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 133 988 is not a prime number.
For example, 133 988 can be divided by 2: 133 988 / 2 = 66 994.
For 133 988 to be a prime number, it would have been required that 133 988 has only two divisors, i.e., itself and 1.
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133 988 is an even number, because it is evenly divisible by 2: 133 988 / 2 = 66 994.
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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 133 988 is about 366.044.
Thus, the square root of 133 988 is not an integer, and therefore 133 988 is not a square number.
The square of a number (here 133 988) is the result of the product of this number (133 988) by itself (i.e., 133 988 × 133 988); the square of 133 988 is sometimes called "raising 133 988 to the power 2", or "133 988 squared".
The square of 133 988 is 17 952 784 144 because 133 988 × 133 988 = 133 9882 = 17 952 784 144.
As a consequence, 133 988 is the square root of 17 952 784 144.
The multiples of 133 988 are all integers evenly divisible by 133 988, that is all numbers such that the remainder of the division by 133 988 is zero. There are infinitely many multiples of 133 988. The smallest multiples of 133 988 are: