13909859 has 6 divisors (see below), whose sum is σ = 14776524. Its totient is φ = 13091360.

The previous prime is 13909849. The next prime is 13909873. The reversal of 13909859 is 95890931.

It is a de Polignac number, because none of the positive numbers 2^k-13909859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13909829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23777 + ... + 24354.

It is an arithmetic number, because the mean of its divisors is an integer number (2462754).

Almost surely, 2^13909859 is an apocalyptic number.

13909859 is a deficient number, since it is larger than the sum of its proper divisors (866665).

13909859 is an equidigital number, since it uses as much as digits as its factorization.

13909859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48165 (or 48148 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 13909859 is about 3729.5923369720. The cubic root of 13909859 is about 240.4958440852.

The spelling of 13909859 in words is "thirteen million, nine hundred nine thousand, eight hundred fifty-nine".