It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 80 040 009 is not a prime number.
For example, 80 040 009 can be divided by 3: 80 040 009 / 3 = 26 680 003.
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For 80 040 009 to be a prime number, it would have been required that 80 040 009 has only two divisors, i.e., itself and 1.
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80 040 009 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 80 040 009 is about 8 946.508.
Thus, the square root of 80 040 009 is not an integer, and therefore 80 040 009 is not a square number.
The square of a number (here 80 040 009) is the result of the product of this number (80 040 009) by itself (i.e., 80 040 009 × 80 040 009); the square of 80 040 009 is sometimes called "raising 80 040 009 to the power 2", or "80 040 009 squared".
The square of 80 040 009 is 6 406 403 040 720 081 because 80 040 009 × 80 040 009 = 80 040 0092 = 6 406 403 040 720 081.
As a consequence, 80 040 009 is the square root of 6 406 403 040 720 081.
80 040 009 is a number with 8 digits.
The multiples of 80 040 009 are all integers evenly divisible by 80 040 009, that is all numbers such that the remainder of the division by 80 040 009 is zero. There are infinitely many multiples of 80 040 009. The smallest multiples of 80 040 009 are: