680072689 has 4 divisors (see below), whose sum is σ = 680410224. Its totient is φ = 679735156.

The previous prime is 680072683. The next prime is 680072737. The reversal of 680072689 is 986270086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 680072689 - 2²³ = 671684081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680072683) 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 3 ways as a sum of consecutive naturals, for example, 165727 + ... + 169780.

It is an arithmetic number, because the mean of its divisors is an integer number (170102556).

Almost surely, 2^680072689 is an apocalyptic number.

It is an amenable number.

680072689 is a deficient number, since it is larger than the sum of its proper divisors (337535).

680072689 is a wasteful number, since it uses less digits than its factorization.

680072689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337534.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 680072689 is about 26078.2033315181. The cubic root of 680072689 is about 879.3972667615.

The spelling of 680072689 in words is "six hundred eighty million, seventy-two thousand, six hundred eighty-nine".