681833684 has 12 divisors (see below), whose sum is σ = 1363667424. Its totient is φ = 292214424.

The previous prime is 681833657. The next prime is 681833687. The reversal of 681833684 is 486338186.

681833684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

681833684 is an admirable number.

It is a super-3 number, since 3×681833684³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681833687) 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, 12175574 + ... + 12175629.

It is an arithmetic number, because the mean of its divisors is an integer number (113638952).

Almost surely, 2^681833684 is an apocalyptic number.

It is an amenable number.

681833684 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

681833684 is a wasteful number, since it uses less digits than its factorization.

681833684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24351214 (or 24351212 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 681833684 is about 26111.9452358494. The cubic root of 681833684 is about 880.1556560056.

The spelling of 681833684 in words is "six hundred eighty-one million, eight hundred thirty-three thousand, six hundred eighty-four".