879857 has 4 divisors (see below), whose sum is σ = 959856. Its totient is φ = 799860.

The previous prime is 879839. The next prime is 879859. The reversal of 879857 is 758978.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 879857 - 2¹⁰ = 878833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (879859) 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, 39983 + ... + 40004.

It is an arithmetic number, because the mean of its divisors is an integer number (239964).

2⁸⁷⁹⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

879857 is a deficient number, since it is larger than the sum of its proper divisors (79999).

879857 is a wasteful number, since it uses less digits than its factorization.

879857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79998.

The product of its digits is 141120, while the sum is 44.

The square root of 879857 is about 938.0069296119. The cubic root of 879857 is about 95.8232061552.

The spelling of 879857 in words is "eight hundred seventy-nine thousand, eight hundred fifty-seven".