111904543 has 4 divisors (see below), whose sum is σ = 111993048. Its totient is φ = 111816040.

The previous prime is 111904537. The next prime is 111904567. The reversal of 111904543 is 345409111.

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 111904543 - 2⁵ = 111904511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111904343) 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, 42328 + ... + 44893.

It is an arithmetic number, because the mean of its divisors is an integer number (27998262).

Almost surely, 2^111904543 is an apocalyptic number.

111904543 is a deficient number, since it is larger than the sum of its proper divisors (88505).

111904543 is an equidigital number, since it uses as much as digits as its factorization.

111904543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88504.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 111904543 is about 10578.4943635661. The cubic root of 111904543 is about 481.8914704885.

The spelling of 111904543 in words is "one hundred eleven million, nine hundred four thousand, five hundred forty-three".