It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 77 880 009 is not a prime number.
For example, 77 880 009 can be divided by 3: 77 880 009 / 3 = 25 960 003.
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For 77 880 009 to be a prime number, it would have been required that 77 880 009 has only two divisors, i.e., itself and 1.
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77 880 009 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 77 880 009 is about 8 824.965.
Thus, the square root of 77 880 009 is not an integer, and therefore 77 880 009 is not a square number.
The square of a number (here 77 880 009) is the result of the product of this number (77 880 009) by itself (i.e., 77 880 009 × 77 880 009); the square of 77 880 009 is sometimes called "raising 77 880 009 to the power 2", or "77 880 009 squared".
The square of 77 880 009 is 6 065 295 801 840 081 because 77 880 009 × 77 880 009 = 77 880 0092 = 6 065 295 801 840 081.
As a consequence, 77 880 009 is the square root of 6 065 295 801 840 081.
77 880 009 is a number with 8 digits.
The multiples of 77 880 009 are all integers evenly divisible by 77 880 009, that is all numbers such that the remainder of the division by 77 880 009 is zero. There are infinitely many multiples of 77 880 009. The smallest multiples of 77 880 009 are: