80911 has 2 divisors, whose sum is σ = 80912. Its totient is φ = 80910.

The previous prime is 80909. The next prime is 80917. The reversal of 80911 is 11908.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80911 - 2¹ = 80909 is a prime.

Together with 80909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40455 + 40456.

It is an arithmetic number, because the mean of its divisors is an integer number (40456).

2⁸⁰⁹¹¹ is an apocalyptic number.

80911 is a deficient number, since it is larger than the sum of its proper divisors (1).

80911 is an equidigital number, since it uses as much as digits as its factorization.

80911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 80911 is about 284.4485893795. The cubic root of 80911 is about 43.2516343619.

It can be divided in two parts, 809 and 11, that added together give a triangular number (820 = T₄₀).

The spelling of 80911 in words is "eighty thousand, nine hundred eleven".