111878443 has 4 divisors (see below), whose sum is σ = 111899920. Its totient is φ = 111856968.

The previous prime is 111878423. The next prime is 111878449. The reversal of 111878443 is 344878111.

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

It is a cyclic number.

It is not a de Polignac number, because 111878443 - 2¹⁷ = 111747371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111878449) 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, 2593 + ... + 15181.

It is an arithmetic number, because the mean of its divisors is an integer number (27974980).

Almost surely, 2^111878443 is an apocalyptic number.

111878443 is a deficient number, since it is larger than the sum of its proper divisors (21477).

111878443 is an equidigital number, since it uses as much as digits as its factorization.

111878443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21476.

The product of its digits is 21504, while the sum is 37.

The square root of 111878443 is about 10577.2606567107. The cubic root of 111878443 is about 481.8540030036.

The spelling of 111878443 in words is "one hundred eleven million, eight hundred seventy-eight thousand, four hundred forty-three".