It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 80 409 474 is not a prime number.
For example, 80 409 474 can be divided by 2: 80 409 474 / 2 = 40 204 737.
For 80 409 474 to be a prime number, it would have been required that 80 409 474 has only two divisors, i.e., itself and 1.
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80 409 474 is an even number, because it is evenly divisible by 2: 80 409 474 / 2 = 40 204 737.
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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 80 409 474 is about 8 967.133.
Thus, the square root of 80 409 474 is not an integer, and therefore 80 409 474 is not a square number.
The square of a number (here 80 409 474) is the result of the product of this number (80 409 474) by itself (i.e., 80 409 474 × 80 409 474); the square of 80 409 474 is sometimes called "raising 80 409 474 to the power 2", or "80 409 474 squared".
The square of 80 409 474 is 6 465 683 508 956 676 because 80 409 474 × 80 409 474 = 80 409 4742 = 6 465 683 508 956 676.
As a consequence, 80 409 474 is the square root of 6 465 683 508 956 676.
80 409 474 is a number with 8 digits.
The multiples of 80 409 474 are all integers evenly divisible by 80 409 474, that is all numbers such that the remainder of the division by 80 409 474 is zero. There are infinitely many multiples of 80 409 474. The smallest multiples of 80 409 474 are: