879076821 has 64 divisors (see below), whose sum is σ = 1429198848. Its totient is φ = 470147328.

The previous prime is 879076801. The next prime is 879076841. The reversal of 879076821 is 128670978.

It is an interprime number because it is at equal distance from previous prime (879076801) and next prime (879076841).

It is not a de Polignac number, because 879076821 - 2⁵ = 879076789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879076801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2772955 + ... + 2773271.

It is an arithmetic number, because the mean of its divisors is an integer number (22331232).

Almost surely, 2^879076821 is an apocalyptic number.

It is an amenable number.

879076821 is a deficient number, since it is larger than the sum of its proper divisors (550122027).

879076821 is a wasteful number, since it uses less digits than its factorization.

879076821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490.

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 879076821 is about 29649.2296864522. The cubic root of 879076821 is about 957.9487527847.

The spelling of 879076821 in words is "eight hundred seventy-nine million, seventy-six thousand, eight hundred twenty-one".