It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 138 378 238 is not a prime number.
For example, 138 378 238 can be divided by 2: 138 378 238 / 2 = 69 189 119.
For 138 378 238 to be a prime number, it would have been required that 138 378 238 has only two divisors, i.e., itself and 1.
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138 378 238 is an even number, because it is evenly divisible by 2: 138 378 238 / 2 = 69 189 119.
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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 138 378 238 is about 11 763.428.
Thus, the square root of 138 378 238 is not an integer, and therefore 138 378 238 is not a square number.
The square of a number (here 138 378 238) is the result of the product of this number (138 378 238) by itself (i.e., 138 378 238 × 138 378 238); the square of 138 378 238 is sometimes called "raising 138 378 238 to the power 2", or "138 378 238 squared".
The square of 138 378 238 is 19 148 536 751 984 644 because 138 378 238 × 138 378 238 = 138 378 2382 = 19 148 536 751 984 644.
As a consequence, 138 378 238 is the square root of 19 148 536 751 984 644.
138 378 238 is a number with 9 digits.
The multiples of 138 378 238 are all integers evenly divisible by 138 378 238, that is all numbers such that the remainder of the division by 138 378 238 is zero. There are infinitely many multiples of 138 378 238. The smallest multiples of 138 378 238 are: