It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 10 109 is not a prime number.
For example, 10 109 can be divided by 11: 10 109 / 11 = 919.
For 10 109 to be a prime number, it would have been required that 10 109 has only two divisors, i.e., itself and 1.
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10 109 is an odd number, because it is not evenly divisible by 2.
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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 10 109 is about 100.544.
Thus, the square root of 10 109 is not an integer, and therefore 10 109 is not a square number.
The square of a number (here 10 109) is the result of the product of this number (10 109) by itself (i.e., 10 109 × 10 109); the square of 10 109 is sometimes called "raising 10 109 to the power 2", or "10 109 squared".
The square of 10 109 is 102 191 881 because 10 109 × 10 109 = 10 1092 = 102 191 881.
As a consequence, 10 109 is the square root of 102 191 881.
The multiples of 10 109 are all integers evenly divisible by 10 109, that is all numbers such that the remainder of the division by 10 109 is zero. There are infinitely many multiples of 10 109. The smallest multiples of 10 109 are: