878591 has 8 divisors (see below), whose sum is σ = 1009824. Its totient is φ = 748800.

The previous prime is 878573. The next prime is 878593. The reversal of 878591 is 195878.

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

It is a cyclic number.

It is not a de Polignac number, because 878591 - 2¹⁰ = 877567 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 (878593) 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, 1991 + ... + 2391.

It is an arithmetic number, because the mean of its divisors is an integer number (126228).

2⁸⁷⁸⁵⁹¹ is an apocalyptic number.

878591 is a deficient number, since it is larger than the sum of its proper divisors (131233).

878591 is a wasteful number, since it uses less digits than its factorization.

878591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its digits is 20160, while the sum is 38.

The square root of 878591 is about 937.3318515873. The cubic root of 878591 is about 95.7772250433. Note that the first 3 decimals are identical.

The spelling of 878591 in words is "eight hundred seventy-eight thousand, five hundred ninety-one".