111664139 has 8 divisors (see below), whose sum is σ = 115875840. Its totient is φ = 107490600.

The previous prime is 111664129. The next prime is 111664141. The reversal of 111664139 is 931466111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111664139 - 2²⁴ = 94886923 is a prime.

It is a super-2 number, since 2×111664139² = 24937759877222642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111664129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3509 + ... + 15350.

It is an arithmetic number, because the mean of its divisors is an integer number (14484480).

Almost surely, 2^111664139 is an apocalyptic number.

111664139 is a deficient number, since it is larger than the sum of its proper divisors (4211701).

111664139 is a wasteful number, since it uses less digits than its factorization.

111664139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19081.

The product of its digits is 3888, while the sum is 32.

The square root of 111664139 is about 10567.1253896223. The cubic root of 111664139 is about 481.5461413591.

The spelling of 111664139 in words is "one hundred eleven million, six hundred sixty-four thousand, one hundred thirty-nine".