80111997 has 32 divisors (see below), whose sum is σ = 137340160. Its totient is φ = 45769536.

The previous prime is 80111989. The next prime is 80112107. The reversal of 80111997 is 79911108.

It is not a de Polignac number, because 80111997 - 2³ = 80111989 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 (80111917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12693 + ... + 17925.

It is an arithmetic number, because the mean of its divisors is an integer number (4291880).

Almost surely, 2^80111997 is an apocalyptic number.

It is an amenable number.

80111997 is a deficient number, since it is larger than the sum of its proper divisors (57228163).

80111997 is an frugal number, since it uses more digits than its factorization.

80111997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5261 (or 5243 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 80111997 is about 8950.5305429343. The cubic root of 80111997 is about 431.0879194317.

The spelling of 80111997 in words is "eighty million, one hundred eleven thousand, nine hundred ninety-seven".