685831011 has 16 divisors (see below), whose sum is σ = 993623040. Its totient is φ = 419182560.

The previous prime is 685831009. The next prime is 685831019. The reversal of 685831011 is 110138586.

685831011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685831011 - 2¹ = 685831009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685831019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192300 + ... + 195833.

It is an arithmetic number, because the mean of its divisors is an integer number (62101440).

Almost surely, 2^685831011 is an apocalyptic number.

685831011 is a deficient number, since it is larger than the sum of its proper divisors (307792029).

685831011 is a wasteful number, since it uses less digits than its factorization.

685831011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388186.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 685831011 is about 26188.3754937186. The cubic root of 685831011 is about 881.8723096599.

Adding to 685831011 its reverse (110138586), we get a palindrome (795969597).

The spelling of 685831011 in words is "six hundred eighty-five million, eight hundred thirty-one thousand, eleven".