685888863 has 12 divisors (see below), whose sum is σ = 1005215064. Its totient is φ = 415690000.

The previous prime is 685888859. The next prime is 685888871. The reversal of 685888863 is 368888586.

It is not a de Polignac number, because 685888863 - 2² = 685888859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685888797 and 685888806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685888963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 944388 + ... + 945113.

It is an arithmetic number, because the mean of its divisors is an integer number (83767922).

Almost surely, 2^685888863 is an apocalyptic number.

685888863 is a deficient number, since it is larger than the sum of its proper divisors (319326201).

685888863 is a wasteful number, since it uses less digits than its factorization.

685888863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889526 (or 1889515 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 60.

The square root of 685888863 is about 26189.4800062926. The cubic root of 685888863 is about 881.8971051958.

The spelling of 685888863 in words is "six hundred eighty-five million, eight hundred eighty-eight thousand, eight hundred sixty-three".