681814679 has 48 divisors (see below), whose sum is σ = 889674240. Its totient is φ = 508636800.

The previous prime is 681814673. The next prime is 681814681. The reversal of 681814679 is 976418186.

681814679 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 681814679 - 2²⁰ = 680766103 is a prime.

Its product of digits (580608) is a multiple of the sum of its prime factors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681814673) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4515254 + ... + 4515404.

It is an arithmetic number, because the mean of its divisors is an integer number (18534880).

Almost surely, 2^681814679 is an apocalyptic number.

681814679 is a deficient number, since it is larger than the sum of its proper divisors (207859561).

681814679 is a wasteful number, since it uses less digits than its factorization.

681814679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 259 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 681814679 is about 26111.5813194069. The cubic root of 681814679 is about 880.1474782960.

The spelling of 681814679 in words is "six hundred eighty-one million, eight hundred fourteen thousand, six hundred seventy-nine".