82811 has 2 divisors, whose sum is σ = 82812. Its totient is φ = 82810.

The previous prime is 82799. The next prime is 82813. The reversal of 82811 is 11828.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82811 is a prime.

It is a super-3 number, since 3×82811³ = 1703669474333193, which contains 333 as substring.

Together with 82813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41405 + 41406.

It is an arithmetic number, because the mean of its divisors is an integer number (41406).

2⁸²⁸¹¹ is an apocalyptic number.

82811 is a deficient number, since it is larger than the sum of its proper divisors (1).

82811 is an equidigital number, since it uses as much as digits as its factorization.

82811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 20.

The square root of 82811 is about 287.7690045853. The cubic root of 82811 is about 43.5875718582.

The spelling of 82811 in words is "eighty-two thousand, eight hundred eleven".