3109991859 has 12 divisors (see below), whose sum is σ = 4837765296. Its totient is φ = 1913841072.

The previous prime is 3109991837. The next prime is 3109991879. The reversal of 3109991859 is 9581999013.

It is not a de Polignac number, because 3109991859 - 2²⁴ = 3093214643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3109991879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13290447 + ... + 13290680.

It is an arithmetic number, because the mean of its divisors is an integer number (403147108).

Almost surely, 2^3109991859 is an apocalyptic number.

3109991859 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3109991859 is a deficient number, since it is larger than the sum of its proper divisors (1727773437).

3109991859 is a wasteful number, since it uses less digits than its factorization.

3109991859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26581146 (or 26581143 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 54.

The square root of 3109991859 is about 55767.3009836409. The cubic root of 3109991859 is about 1459.6646285109.

The spelling of 3109991859 in words is "three billion, one hundred nine million, nine hundred ninety-one thousand, eight hundred fifty-nine".