811879 has 2 divisors, whose sum is σ = 811880. Its totient is φ = 811878.

The previous prime is 811871. The next prime is 811897. The reversal of 811879 is 978118.

Together with next prime (811897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811879 - 2³ = 811871 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405939 + 405940.

It is an arithmetic number, because the mean of its divisors is an integer number (405940).

2⁸¹¹⁸⁷⁹ is an apocalyptic number.

811879 is a deficient number, since it is larger than the sum of its proper divisors (1).

811879 is an equidigital number, since it uses as much as digits as its factorization.

811879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 34.

The square root of 811879 is about 901.0432841989. The cubic root of 811879 is about 93.2889996363.

The spelling of 811879 in words is "eight hundred eleven thousand, eight hundred seventy-nine".