It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 26 427 009 is not a prime number.
For example, 26 427 009 can be divided by 3: 26 427 009 / 3 = 8 809 003.
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For 26 427 009 to be a prime number, it would have been required that 26 427 009 has only two divisors, i.e., itself and 1.
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26 427 009 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 26 427 009 is about 5 140.721.
Thus, the square root of 26 427 009 is not an integer, and therefore 26 427 009 is not a square number.
The square of a number (here 26 427 009) is the result of the product of this number (26 427 009) by itself (i.e., 26 427 009 × 26 427 009); the square of 26 427 009 is sometimes called "raising 26 427 009 to the power 2", or "26 427 009 squared".
The square of 26 427 009 is 698 386 804 686 081 because 26 427 009 × 26 427 009 = 26 427 0092 = 698 386 804 686 081.
As a consequence, 26 427 009 is the square root of 698 386 804 686 081.
26 427 009 is a number with 8 digits.
The multiples of 26 427 009 are all integers evenly divisible by 26 427 009, that is all numbers such that the remainder of the division by 26 427 009 is zero. There are infinitely many multiples of 26 427 009. The smallest multiples of 26 427 009 are: