685808063 has 4 divisors (see below), whose sum is σ = 695202768. Its totient is φ = 676413360.

The previous prime is 685808041. The next prime is 685808083. The reversal of 685808063 is 360808586.

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 685808063 - 2¹⁰ = 685807039 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 (685808083) 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, 4697243 + ... + 4697388.

It is an arithmetic number, because the mean of its divisors is an integer number (173800692).

Almost surely, 2^685808063 is an apocalyptic number.

685808063 is a deficient number, since it is larger than the sum of its proper divisors (9394705).

685808063 is an equidigital number, since it uses as much as digits as its factorization.

685808063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9394704.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 685808063 is about 26187.9373567297. The cubic root of 685808063 is about 881.8624736939.

The spelling of 685808063 in words is "six hundred eighty-five million, eight hundred eight thousand, sixty-three".