878587859 has 4 divisors (see below), whose sum is σ = 879002280. Its totient is φ = 878173440.

The previous prime is 878587813. The next prime is 878587877. The reversal of 878587859 is 958785878.

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

It is a cyclic number.

It is not a de Polignac number, because 878587859 - 2²⁰ = 877539283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 878587795 and 878587804.

It is not an unprimeable number, because it can be changed into a prime (878587159) 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, 204014 + ... + 208275.

It is an arithmetic number, because the mean of its divisors is an integer number (219750570).

Almost surely, 2^878587859 is an apocalyptic number.

878587859 is a deficient number, since it is larger than the sum of its proper divisors (414421).

878587859 is a wasteful number, since it uses less digits than its factorization.

878587859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414420.

The product of its digits is 45158400, while the sum is 65.

The square root of 878587859 is about 29640.9827603607. The cubic root of 878587859 is about 957.7711090724.

The spelling of 878587859 in words is "eight hundred seventy-eight million, five hundred eighty-seven thousand, eight hundred fifty-nine".