810879 has 8 divisors (see below), whose sum is σ = 1093680. Its totient is φ = 534336.

The previous prime is 810871. The next prime is 810881. The reversal of 810879 is 978018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 810879 - 2³ = 810871 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

810879 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1252 + ... + 1785.

It is an arithmetic number, because the mean of its divisors is an integer number (136710).

2⁸¹⁰⁸⁷⁹ is an apocalyptic number.

810879 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

810879 is a deficient number, since it is larger than the sum of its proper divisors (282801).

810879 is a wasteful number, since it uses less digits than its factorization.

810879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 810879 is about 900.4882009221. The cubic root of 810879 is about 93.2506822156.

The spelling of 810879 in words is "eight hundred ten thousand, eight hundred seventy-nine".