112991871 has 8 divisors (see below), whose sum is σ = 150840880. Its totient is φ = 75235392.

The previous prime is 112991867. The next prime is 112991873. The reversal of 112991871 is 178199211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 112991871 - 2² = 112991867 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 (112991873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20230 + ... + 25203.

It is an arithmetic number, because the mean of its divisors is an integer number (18855110).

Almost surely, 2^112991871 is an apocalyptic number.

112991871 is a deficient number, since it is larger than the sum of its proper divisors (37849009).

112991871 is an equidigital number, since it uses as much as digits as its factorization.

112991871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46265.

The product of its digits is 9072, while the sum is 39.

The square root of 112991871 is about 10629.7634498610. The cubic root of 112991871 is about 483.4472194046.

The spelling of 112991871 in words is "one hundred twelve million, nine hundred ninety-one thousand, eight hundred seventy-one".