680450729 has 8 divisors (see below), whose sum is σ = 792331200. Its totient is φ = 572238576.

The previous prime is 680450711. The next prime is 680450737. The reversal of 680450729 is 927054086.

680450729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 680450729 - 2²⁰ = 679402153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680453729) 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, 916679 + ... + 917420.

It is an arithmetic number, because the mean of its divisors is an integer number (99041400).

Almost surely, 2^680450729 is an apocalyptic number.

It is an amenable number.

680450729 is a deficient number, since it is larger than the sum of its proper divisors (111880471).

680450729 is a wasteful number, since it uses less digits than its factorization.

680450729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834159.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 680450729 is about 26085.4505232323. The cubic root of 680450729 is about 879.5601835431.

The spelling of 680450729 in words is "six hundred eighty million, four hundred fifty thousand, seven hundred twenty-nine".