6855079139 has 2 divisors, whose sum is σ = 6855079140. Its totient is φ = 6855079138.

The previous prime is 6855079123. The next prime is 6855079169. The reversal of 6855079139 is 9319705586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6855079139 - 2⁴ = 6855079123 is a prime.

It is a super-2 number, since 2×6855079139² = 93984220003905962642, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (6855079169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3427539569 + 3427539570.

It is an arithmetic number, because the mean of its divisors is an integer number (3427539570).

Almost surely, 2^6855079139 is an apocalyptic number.

6855079139 is a deficient number, since it is larger than the sum of its proper divisors (1).

6855079139 is an equidigital number, since it uses as much as digits as its factorization.

6855079139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The square root of 6855079139 is about 82795.4053012605. The cubic root of 6855079139 is about 1899.6378939667.

The spelling of 6855079139 in words is "six billion, eight hundred fifty-five million, seventy-nine thousand, one hundred thirty-nine".