685168863 has 4 divisors (see below), whose sum is σ = 913558488. Its totient is φ = 456779240.

The previous prime is 685168859. The next prime is 685168879. The reversal of 685168863 is 368861586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 685168863 - 2² = 685168859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685168843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114194808 + ... + 114194813.

It is an arithmetic number, because the mean of its divisors is an integer number (228389622).

Almost surely, 2^685168863 is an apocalyptic number.

685168863 is a deficient number, since it is larger than the sum of its proper divisors (228389625).

685168863 is a wasteful number, since it uses less digits than its factorization.

685168863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228389624.

The product of its digits is 1658880, while the sum is 51.

The square root of 685168863 is about 26175.7304196082. The cubic root of 685168863 is about 881.5884117319.

The spelling of 685168863 in words is "six hundred eighty-five million, one hundred sixty-eight thousand, eight hundred sixty-three".