6840005791 has 2 divisors, whose sum is σ = 6840005792. Its totient is φ = 6840005790.

The previous prime is 6840005749. The next prime is 6840005803. The reversal of 6840005791 is 1975000486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6840005791 - 2⁷ = 6840005663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6840005191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420002895 + 3420002896.

It is an arithmetic number, because the mean of its divisors is an integer number (3420002896).

Almost surely, 2^6840005791 is an apocalyptic number.

6840005791 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840005791 is an equidigital number, since it uses as much as digits as its factorization.

6840005791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 6840005791 is about 82704.3275228086. The cubic root of 6840005791 is about 1898.2445273139.

The spelling of 6840005791 in words is "six billion, eight hundred forty million, five thousand, seven hundred ninety-one".