111489681 has 4 divisors (see below), whose sum is σ = 148652912. Its totient is φ = 74326452.

The previous prime is 111489649. The next prime is 111489683. The reversal of 111489681 is 186984111.

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.

It is not a de Polignac number, because 111489681 - 2⁵ = 111489649 is a prime.

It is a super-2 number, since 2×111489681² = 24859897938963522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111489683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18581611 + ... + 18581616.

It is an arithmetic number, because the mean of its divisors is an integer number (37163228).

Almost surely, 2^111489681 is an apocalyptic number.

It is an amenable number.

111489681 is a deficient number, since it is larger than the sum of its proper divisors (37163231).

111489681 is an equidigital number, since it uses as much as digits as its factorization.

111489681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37163230.

The product of its digits is 13824, while the sum is 39.

The square root of 111489681 is about 10558.8674108543. The cubic root of 111489681 is about 481.2952301111.

The spelling of 111489681 in words is "one hundred eleven million, four hundred eighty-nine thousand, six hundred eighty-one".