680865729 has 8 divisors (see below), whose sum is σ = 911588832. Its totient is φ = 452026560.

The previous prime is 680865707. The next prime is 680865737. The reversal of 680865729 is 927568086.

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

It is not a de Polignac number, because 680865729 - 2⁵ = 680865697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684865729) 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, 470139 + ... + 471584.

It is an arithmetic number, because the mean of its divisors is an integer number (113948604).

Almost surely, 2^680865729 is an apocalyptic number.

It is an amenable number.

680865729 is a deficient number, since it is larger than the sum of its proper divisors (230723103).

680865729 is a wasteful number, since it uses less digits than its factorization.

680865729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941967.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 680865729 is about 26093.4039366274. The cubic root of 680865729 is about 879.7389588161.

The spelling of 680865729 in words is "six hundred eighty million, eight hundred sixty-five thousand, seven hundred twenty-nine".