111887871 has 16 divisors (see below), whose sum is σ = 152755200. Its totient is φ = 72814688.

The previous prime is 111887861. The next prime is 111887873. The reversal of 111887871 is 178788111.

It is a cyclic number.

It is not a de Polignac number, because 111887871 - 2¹⁰ = 111886847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111887873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70990 + ... + 72548.

It is an arithmetic number, because the mean of its divisors is an integer number (9547200).

Almost surely, 2^111887871 is an apocalyptic number.

111887871 is a deficient number, since it is larger than the sum of its proper divisors (40867329).

111887871 is a wasteful number, since it uses less digits than its factorization.

111887871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118.

The product of its digits is 25088, while the sum is 42.

The square root of 111887871 is about 10577.7063203702. The cubic root of 111887871 is about 481.8675379076.

The spelling of 111887871 in words is "one hundred eleven million, eight hundred eighty-seven thousand, eight hundred seventy-one".