879439811 has 6 divisors (see below), whose sum is σ = 886495236. Its totient is φ = 872389700.

The previous prime is 879439777. The next prime is 879439829. The reversal of 879439811 is 118934978.

It is not a de Polignac number, because 879439811 - 2⁶ = 879439747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 879439811.

It is not an unprimeable number, because it can be changed into a prime (879439861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 338126 + ... + 340716.

It is an arithmetic number, because the mean of its divisors is an integer number (147749206).

Almost surely, 2^879439811 is an apocalyptic number.

879439811 is a deficient number, since it is larger than the sum of its proper divisors (7055425).

879439811 is an frugal number, since it uses more digits than its factorization.

879439811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313 (or 2722 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 879439811 is about 29655.3504615946. The cubic root of 879439811 is about 958.0805872878.

The spelling of 879439811 in words is "eight hundred seventy-nine million, four hundred thirty-nine thousand, eight hundred eleven".