685271814 has 12 divisors (see below), whose sum is σ = 1370671884. Its totient is φ = 228402564.

The previous prime is 685271813. The next prime is 685271861. The reversal of 685271814 is 418172586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685271813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58779 + ... + 69465.

It is an arithmetic number, because the mean of its divisors is an integer number (114222657).

Almost surely, 2^685271814 is an apocalyptic number.

685271814 is an abundant number, since it is smaller than the sum of its proper divisors (685400070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685271814 is an frugal number, since it uses more digits than its factorization.

685271814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21379 (or 10692 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 685271814 is about 26177.6968811238. The cubic root of 685271814 is about 881.6325642847.

The spelling of 685271814 in words is "six hundred eighty-five million, two hundred seventy-one thousand, eight hundred fourteen".