It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 80 423 688 is not a prime number.
For example, 80 423 688 can be divided by 2: 80 423 688 / 2 = 40 211 844.
For 80 423 688 to be a prime number, it would have been required that 80 423 688 has only two divisors, i.e., itself and 1.
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80 423 688 is an even number, because it is evenly divisible by 2: 80 423 688 / 2 = 40 211 844.
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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 80 423 688 is about 8 967.926.
Thus, the square root of 80 423 688 is not an integer, and therefore 80 423 688 is not a square number.
The square of a number (here 80 423 688) is the result of the product of this number (80 423 688) by itself (i.e., 80 423 688 × 80 423 688); the square of 80 423 688 is sometimes called "raising 80 423 688 to the power 2", or "80 423 688 squared".
The square of 80 423 688 is 6 467 969 591 521 344 because 80 423 688 × 80 423 688 = 80 423 6882 = 6 467 969 591 521 344.
As a consequence, 80 423 688 is the square root of 6 467 969 591 521 344.
80 423 688 is a number with 8 digits.
The multiples of 80 423 688 are all integers evenly divisible by 80 423 688, that is all numbers such that the remainder of the division by 80 423 688 is zero. There are infinitely many multiples of 80 423 688. The smallest multiples of 80 423 688 are: