878813 has 4 divisors (see below), whose sum is σ = 946428. Its totient is φ = 811200.

The previous prime is 878797. The next prime is 878821. The reversal of 878813 is 318878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 605284 + 273529 = 778^2 + 523^2 .

It is not a de Polignac number, because 878813 - 2⁴ = 878797 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 (878833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33788 + ... + 33813.

It is an arithmetic number, because the mean of its divisors is an integer number (236607).

2⁸⁷⁸⁸¹³ is an apocalyptic number.

It is an amenable number.

878813 is a deficient number, since it is larger than the sum of its proper divisors (67615).

878813 is a wasteful number, since it uses less digits than its factorization.

878813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67614.

The product of its digits is 10752, while the sum is 35.

The square root of 878813 is about 937.4502653474. The cubic root of 878813 is about 95.7852912741.

It can be divided in two parts, 8788 and 13, that multiplied together give a square (114244 = 338²).

The spelling of 878813 in words is "eight hundred seventy-eight thousand, eight hundred thirteen".