816879 has 12 divisors (see below), whose sum is σ = 1267224. Its totient is φ = 466704.

The previous prime is 816869. The next prime is 816883. The reversal of 816879 is 978618.

It is not a de Polignac number, because 816879 - 2⁵ = 816847 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2632 + ... + 2925.

It is an arithmetic number, because the mean of its divisors is an integer number (105602).

2⁸¹⁶⁸⁷⁹ is an apocalyptic number.

816879 is a deficient number, since it is larger than the sum of its proper divisors (450345).

816879 is a wasteful number, since it uses less digits than its factorization.

816879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5574 (or 5567 counting only the distinct ones).

The product of its digits is 24192, while the sum is 39.

The square root of 816879 is about 903.8135869747. The cubic root of 816879 is about 93.4801162595.

The spelling of 816879 in words is "eight hundred sixteen thousand, eight hundred seventy-nine".