It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 044 is not a prime number.
For example, 138 044 can be divided by 2: 138 044 / 2 = 69 022.
For 138 044 to be a prime number, it would have been required that 138 044 has only two divisors, i.e., itself and 1.
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138 044 is an even number, because it is evenly divisible by 2: 138 044 / 2 = 69 022.
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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 138 044 is about 371.543.
Thus, the square root of 138 044 is not an integer, and therefore 138 044 is not a square number.
The square of a number (here 138 044) is the result of the product of this number (138 044) by itself (i.e., 138 044 × 138 044); the square of 138 044 is sometimes called "raising 138 044 to the power 2", or "138 044 squared".
The square of 138 044 is 19 056 145 936 because 138 044 × 138 044 = 138 0442 = 19 056 145 936.
As a consequence, 138 044 is the square root of 19 056 145 936.
The multiples of 138 044 are all integers evenly divisible by 138 044, that is all numbers such that the remainder of the division by 138 044 is zero. There are infinitely many multiples of 138 044. The smallest multiples of 138 044 are: