It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 109 998 138 is not a prime number.
For example, 109 998 138 can be divided by 2: 109 998 138 / 2 = 54 999 069.
For 109 998 138 to be a prime number, it would have been required that 109 998 138 has only two divisors, i.e., itself and 1.
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109 998 138 is an even number, because it is evenly divisible by 2: 109 998 138 / 2 = 54 999 069.
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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 109 998 138 is about 10 488.000.
Thus, the square root of 109 998 138 is not an integer, and therefore 109 998 138 is not a square number.
The square of a number (here 109 998 138) is the result of the product of this number (109 998 138) by itself (i.e., 109 998 138 × 109 998 138); the square of 109 998 138 is sometimes called "raising 109 998 138 to the power 2", or "109 998 138 squared".
The square of 109 998 138 is 12 099 590 363 467 044 because 109 998 138 × 109 998 138 = 109 998 1382 = 12 099 590 363 467 044.
As a consequence, 109 998 138 is the square root of 12 099 590 363 467 044.
109 998 138 is a number with 9 digits.
The multiples of 109 998 138 are all integers evenly divisible by 109 998 138, that is all numbers such that the remainder of the division by 109 998 138 is zero. There are infinitely many multiples of 109 998 138. The smallest multiples of 109 998 138 are: