685861834 has 16 divisors (see below), whose sum is σ = 1179479808. Its totient is φ = 293011632.

The previous prime is 685861831. The next prime is 685861871. The reversal of 685861834 is 438168586.

685861834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (685861831) 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, 72834 + ... + 81709.

It is an arithmetic number, because the mean of its divisors is an integer number (73717488).

Almost surely, 2^685861834 is an apocalyptic number.

685861834 is a deficient number, since it is larger than the sum of its proper divisors (493617974).

685861834 is a wasteful number, since it uses less digits than its factorization.

685861834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154869.

The product of its digits is 1105920, while the sum is 49.

The square root of 685861834 is about 26188.9639733992. The cubic root of 685861834 is about 881.8855206611.

The spelling of 685861834 in words is "six hundred eighty-five million, eight hundred sixty-one thousand, eight hundred thirty-four".