111805849 has 4 divisors (see below), whose sum is σ = 111899236. Its totient is φ = 111712464.

The previous prime is 111805843. The next prime is 111805853. The reversal of 111805849 is 948508111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6538249 + 105267600 = 2557^2 + 10260^2 .

It is a cyclic number.

It is not a de Polignac number, because 111805849 - 2⁷ = 111805721 is a prime.

It is a super-2 number, since 2×111805849² = 25001095741221602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111805843) 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, 44874 + ... + 47299.

It is an arithmetic number, because the mean of its divisors is an integer number (27974809).

Almost surely, 2^111805849 is an apocalyptic number.

It is an amenable number.

111805849 is a deficient number, since it is larger than the sum of its proper divisors (93387).

111805849 is an equidigital number, since it uses as much as digits as its factorization.

111805849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93386.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 111805849 is about 10573.8284930294. The cubic root of 111805849 is about 481.7497610633.

The spelling of 111805849 in words is "one hundred eleven million, eight hundred five thousand, eight hundred forty-nine".