It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 13 638 014 is not a prime number.
For example, 13 638 014 can be divided by 2: 13 638 014 / 2 = 6 819 007.
For 13 638 014 to be a prime number, it would have been required that 13 638 014 has only two divisors, i.e., itself and 1.
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13 638 014 is an even number, because it is evenly divisible by 2: 13 638 014 / 2 = 6 819 007.
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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 13 638 014 is about 3 692.968.
Thus, the square root of 13 638 014 is not an integer, and therefore 13 638 014 is not a square number.
The square of a number (here 13 638 014) is the result of the product of this number (13 638 014) by itself (i.e., 13 638 014 × 13 638 014); the square of 13 638 014 is sometimes called "raising 13 638 014 to the power 2", or "13 638 014 squared".
The square of 13 638 014 is 185 995 425 864 196 because 13 638 014 × 13 638 014 = 13 638 0142 = 185 995 425 864 196.
As a consequence, 13 638 014 is the square root of 185 995 425 864 196.
13 638 014 is a number with 8 digits.
The multiples of 13 638 014 are all integers evenly divisible by 13 638 014, that is all numbers such that the remainder of the division by 13 638 014 is zero. There are infinitely many multiples of 13 638 014. The smallest multiples of 13 638 014 are: