111888139 has 8 divisors (see below), whose sum is σ = 125037360. Its totient is φ = 99235200.

The previous prime is 111888121. The next prime is 111888149. The reversal of 111888139 is 931888111.

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 111888139 - 2¹¹ = 111886091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111888149) 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, 123594 + ... + 124495.

It is an arithmetic number, because the mean of its divisors is an integer number (15629670).

Almost surely, 2^111888139 is an apocalyptic number.

111888139 is a deficient number, since it is larger than the sum of its proper divisors (13149221).

111888139 is a wasteful number, since it uses less digits than its factorization.

111888139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248141.

The product of its digits is 13824, while the sum is 40.

The square root of 111888139 is about 10577.7189885154. The cubic root of 111888139 is about 481.8679226392.

The spelling of 111888139 in words is "one hundred eleven million, eight hundred eighty-eight thousand, one hundred thirty-nine".