111689311 has 16 divisors (see below), whose sum is σ = 120913920. Its totient is φ = 102864960.

The previous prime is 111689309. The next prime is 111689317. The reversal of 111689311 is 113986111.

It is a cyclic number.

It is not a de Polignac number, because 111689311 - 2¹ = 111689309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111689317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272875 + ... + 273283.

It is an arithmetic number, because the mean of its divisors is an integer number (7557120).

Almost surely, 2^111689311 is an apocalyptic number.

111689311 is a deficient number, since it is larger than the sum of its proper divisors (9224609).

111689311 is a wasteful number, since it uses less digits than its factorization.

111689311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 1296, while the sum is 31.

The square root of 111689311 is about 10568.3163749010. The cubic root of 111689311 is about 481.5823229803.

The spelling of 111689311 in words is "one hundred eleven million, six hundred eighty-nine thousand, three hundred eleven".