686834885 has 16 divisors (see below), whose sum is σ = 923432832. Its totient is φ = 486014400.

The previous prime is 686834873. The next prime is 686834887. The reversal of 686834885 is 588438686.

It is not a de Polignac number, because 686834885 - 2¹⁴ = 686818501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 686834885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686834887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166721 + ... + 170790.

It is an arithmetic number, because the mean of its divisors is an integer number (57714552).

Almost surely, 2^686834885 is an apocalyptic number.

It is an amenable number.

686834885 is a deficient number, since it is larger than the sum of its proper divisors (236597947).

686834885 is a wasteful number, since it uses less digits than its factorization.

686834885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337564.

The product of its digits is 8847360, while the sum is 56.

The square root of 686834885 is about 26207.5348897984. The cubic root of 686834885 is about 882.3023753162.

The spelling of 686834885 in words is "six hundred eighty-six million, eight hundred thirty-four thousand, eight hundred eighty-five".