It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 80 940 742 is not a prime number.
For example, 80 940 742 can be divided by 2: 80 940 742 / 2 = 40 470 371.
For 80 940 742 to be a prime number, it would have been required that 80 940 742 has only two divisors, i.e., itself and 1.
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80 940 742 is an even number, because it is evenly divisible by 2: 80 940 742 / 2 = 40 470 371.
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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 80 940 742 is about 8 996.707.
Thus, the square root of 80 940 742 is not an integer, and therefore 80 940 742 is not a square number.
The square of a number (here 80 940 742) is the result of the product of this number (80 940 742) by itself (i.e., 80 940 742 × 80 940 742); the square of 80 940 742 is sometimes called "raising 80 940 742 to the power 2", or "80 940 742 squared".
The square of 80 940 742 is 6 551 403 715 510 564 because 80 940 742 × 80 940 742 = 80 940 7422 = 6 551 403 715 510 564.
As a consequence, 80 940 742 is the square root of 6 551 403 715 510 564.
80 940 742 is a number with 8 digits.
The multiples of 80 940 742 are all integers evenly divisible by 80 940 742, that is all numbers such that the remainder of the division by 80 940 742 is zero. There are infinitely many multiples of 80 940 742. The smallest multiples of 80 940 742 are: