80111399 has 4 divisors (see below), whose sum is σ = 80687880. Its totient is φ = 79534920.

The previous prime is 80111393. The next prime is 80111407. The reversal of 80111399 is 99311108.

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 80111399 - 2¹⁶ = 80045863 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 (80111393) 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, 288032 + ... + 288309.

It is an arithmetic number, because the mean of its divisors is an integer number (20171970).

Almost surely, 2^80111399 is an apocalyptic number.

80111399 is a deficient number, since it is larger than the sum of its proper divisors (576481).

80111399 is a wasteful number, since it uses less digits than its factorization.

80111399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576480.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 80111399 is about 8950.4971370310. The cubic root of 80111399 is about 431.0868468033.

The spelling of 80111399 in words is "eighty million, one hundred eleven thousand, three hundred ninety-nine".