686340863 has 16 divisors (see below), whose sum is σ = 748782720. Its totient is φ = 625314816.

The previous prime is 686340839. The next prime is 686340871. The reversal of 686340863 is 368043686.

It is a cyclic number.

It is not a de Polignac number, because 686340863 - 2⁶ = 686340799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686340803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 906281 + ... + 907037.

It is an arithmetic number, because the mean of its divisors is an integer number (46798920).

Almost surely, 2^686340863 is an apocalyptic number.

686340863 is a deficient number, since it is larger than the sum of its proper divisors (62441857).

686340863 is a wasteful number, since it uses less digits than its factorization.

686340863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586.

The product of its (nonzero) digits is 497664, while the sum is 44.

The square root of 686340863 is about 26198.1080042052. The cubic root of 686340863 is about 882.0907857283.

The spelling of 686340863 in words is "six hundred eighty-six million, three hundred forty thousand, eight hundred sixty-three".