It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 80 509 806 is not a prime number.
For example, 80 509 806 can be divided by 2: 80 509 806 / 2 = 40 254 903.
For 80 509 806 to be a prime number, it would have been required that 80 509 806 has only two divisors, i.e., itself and 1.
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80 509 806 is an even number, because it is evenly divisible by 2: 80 509 806 / 2 = 40 254 903.
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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 80 509 806 is about 8 972.726.
Thus, the square root of 80 509 806 is not an integer, and therefore 80 509 806 is not a square number.
The square of a number (here 80 509 806) is the result of the product of this number (80 509 806) by itself (i.e., 80 509 806 × 80 509 806); the square of 80 509 806 is sometimes called "raising 80 509 806 to the power 2", or "80 509 806 squared".
The square of 80 509 806 is 6 481 828 862 157 636 because 80 509 806 × 80 509 806 = 80 509 8062 = 6 481 828 862 157 636.
As a consequence, 80 509 806 is the square root of 6 481 828 862 157 636.
80 509 806 is a number with 8 digits.
The multiples of 80 509 806 are all integers evenly divisible by 80 509 806, that is all numbers such that the remainder of the division by 80 509 806 is zero. There are infinitely many multiples of 80 509 806. The smallest multiples of 80 509 806 are: