6809111931 has 4 divisors (see below), whose sum is σ = 9078815912. Its totient is φ = 4539407952.

The previous prime is 6809111923. The next prime is 6809111999. The reversal of 6809111931 is 1391119086.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6809111931 - 2³ = 6809111923 is a prime.

It is a super-2 number, since 2×6809111931² = 92728010577773097522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6809111931.

It is not an unprimeable number, because it can be changed into a prime (6809111131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134851986 + ... + 1134851991.

It is an arithmetic number, because the mean of its divisors is an integer number (2269703978).

Almost surely, 2^6809111931 is an apocalyptic number.

6809111931 is a deficient number, since it is larger than the sum of its proper divisors (2269703981).

6809111931 is a wasteful number, since it uses less digits than its factorization.

6809111931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269703980.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 6809111931 is about 82517.3432134118. The cubic root of 6809111931 is about 1895.3823165615.

The spelling of 6809111931 in words is "six billion, eight hundred nine million, one hundred eleven thousand, nine hundred thirty-one".