111384681 has 4 divisors (see below), whose sum is σ = 148512912. Its totient is φ = 74256452.

The previous prime is 111384677. The next prime is 111384701. The reversal of 111384681 is 186483111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186483111 = 3 ⋅62161037.

It is a cyclic number.

It is not a de Polignac number, because 111384681 - 2² = 111384677 is a prime.

It is a super-2 number, since 2×111384681² = 24813094322943522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111384601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18564111 + ... + 18564116.

It is an arithmetic number, because the mean of its divisors is an integer number (37128228).

Almost surely, 2^111384681 is an apocalyptic number.

It is an amenable number.

111384681 is a deficient number, since it is larger than the sum of its proper divisors (37128231).

111384681 is an equidigital number, since it uses as much as digits as its factorization.

111384681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37128230.

The product of its digits is 4608, while the sum is 33.

The square root of 111384681 is about 10553.8941154438. The cubic root of 111384681 is about 481.1440894501.

The spelling of 111384681 in words is "one hundred eleven million, three hundred eighty-four thousand, six hundred eighty-one".