It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 12 338 138 is not a prime number.
For example, 12 338 138 can be divided by 2: 12 338 138 / 2 = 6 169 069.
For 12 338 138 to be a prime number, it would have been required that 12 338 138 has only two divisors, i.e., itself and 1.
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12 338 138 is an even number, because it is evenly divisible by 2: 12 338 138 / 2 = 6 169 069.
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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 12 338 138 is about 3 512.569.
Thus, the square root of 12 338 138 is not an integer, and therefore 12 338 138 is not a square number.
The square of a number (here 12 338 138) is the result of the product of this number (12 338 138) by itself (i.e., 12 338 138 × 12 338 138); the square of 12 338 138 is sometimes called "raising 12 338 138 to the power 2", or "12 338 138 squared".
The square of 12 338 138 is 152 229 649 307 044 because 12 338 138 × 12 338 138 = 12 338 1382 = 152 229 649 307 044.
As a consequence, 12 338 138 is the square root of 152 229 649 307 044.
12 338 138 is a number with 8 digits.
The multiples of 12 338 138 are all integers evenly divisible by 12 338 138, that is all numbers such that the remainder of the division by 12 338 138 is zero. There are infinitely many multiples of 12 338 138. The smallest multiples of 12 338 138 are: