It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 348 is not a prime number.
For example, 138 348 can be divided by 2: 138 348 / 2 = 69 174.
For 138 348 to be a prime number, it would have been required that 138 348 has only two divisors, i.e., itself and 1.
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138 348 is an even number, because it is evenly divisible by 2: 138 348 / 2 = 69 174.
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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 138 348 is about 371.952.
Thus, the square root of 138 348 is not an integer, and therefore 138 348 is not a square number.
The square of a number (here 138 348) is the result of the product of this number (138 348) by itself (i.e., 138 348 × 138 348); the square of 138 348 is sometimes called "raising 138 348 to the power 2", or "138 348 squared".
The square of 138 348 is 19 140 169 104 because 138 348 × 138 348 = 138 3482 = 19 140 169 104.
As a consequence, 138 348 is the square root of 19 140 169 104.
The multiples of 138 348 are all integers evenly divisible by 138 348, that is all numbers such that the remainder of the division by 138 348 is zero. There are infinitely many multiples of 138 348. The smallest multiples of 138 348 are: