812879 has 6 divisors (see below), whose sum is σ = 832104. Its totient is φ = 793940.

The previous prime is 812869. The next prime is 812921. The reversal of 812879 is 978218.

It is a happy number.

It is not a de Polignac number, because 812879 - 2¹⁶ = 747343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7544 + ... + 7650.

It is an arithmetic number, because the mean of its divisors is an integer number (138684).

2⁸¹²⁸⁷⁹ is an apocalyptic number.

812879 is a deficient number, since it is larger than the sum of its proper divisors (19225).

812879 is an equidigital number, since it uses as much as digits as its factorization.

812879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 178 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 812879 is about 901.5980257299. The cubic root of 812879 is about 93.3272856059.

The spelling of 812879 in words is "eight hundred twelve thousand, eight hundred seventy-nine".