686083881 has 16 divisors (see below), whose sum is σ = 1046113664. Its totient is φ = 391803264.

The previous prime is 686083843. The next prime is 686083883. The reversal of 686083881 is 188380686.

It is a happy number.

686083881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 686083881 - 2⁶ = 686083817 is a prime.

It is a super-2 number, since 2×686083881² = 941422183536044322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 686083881.

It is not an unprimeable number, because it can be changed into a prime (686083883) 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, 27495 + ... + 46131.

It is an arithmetic number, because the mean of its divisors is an integer number (65382104).

Almost surely, 2^686083881 is an apocalyptic number.

It is an amenable number.

686083881 is a deficient number, since it is larger than the sum of its proper divisors (360029783).

686083881 is a wasteful number, since it uses less digits than its factorization.

686083881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20400.

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 686083881 is about 26193.2029542017. The cubic root of 686083881 is about 881.9806802089.

The spelling of 686083881 in words is "six hundred eighty-six million, eighty-three thousand, eight hundred eighty-one".