685307161 has 8 divisors (see below), whose sum is σ = 854409024. Its totient is φ = 534005520.

The previous prime is 685307153. The next prime is 685307167. The reversal of 685307161 is 161703586.

685307161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685307161 - 2³ = 685307153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685307161.

It is not an unprimeable number, because it can be changed into a prime (685307167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4449970 + ... + 4450123.

It is an arithmetic number, because the mean of its divisors is an integer number (106801128).

Almost surely, 2^685307161 is an apocalyptic number.

It is an amenable number.

685307161 is a deficient number, since it is larger than the sum of its proper divisors (169101863).

685307161 is a wasteful number, since it uses less digits than its factorization.

685307161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8900111.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 685307161 is about 26178.3720082056. The cubic root of 685307161 is about 881.6477225182.

The spelling of 685307161 in words is "six hundred eighty-five million, three hundred seven thousand, one hundred sixty-one".