It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 133 628 is not a prime number.
For example, 133 628 can be divided by 2: 133 628 / 2 = 66 814.
For 133 628 to be a prime number, it would have been required that 133 628 has only two divisors, i.e., itself and 1.
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133 628 is an even number, because it is evenly divisible by 2: 133 628 / 2 = 66 814.
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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 133 628 is about 365.552.
Thus, the square root of 133 628 is not an integer, and therefore 133 628 is not a square number.
The square of a number (here 133 628) is the result of the product of this number (133 628) by itself (i.e., 133 628 × 133 628); the square of 133 628 is sometimes called "raising 133 628 to the power 2", or "133 628 squared".
The square of 133 628 is 17 856 442 384 because 133 628 × 133 628 = 133 6282 = 17 856 442 384.
As a consequence, 133 628 is the square root of 17 856 442 384.
The multiples of 133 628 are all integers evenly divisible by 133 628, that is all numbers such that the remainder of the division by 133 628 is zero. There are infinitely many multiples of 133 628. The smallest multiples of 133 628 are: