680750709 has 16 divisors (see below), whose sum is σ = 926187264. Its totient is φ = 444600000.

The previous prime is 680750701. The next prime is 680750723. The reversal of 680750709 is 907057086.

It is not a de Polignac number, because 680750709 - 2³ = 680750701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680750701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116559 + ... + 122259.

It is an arithmetic number, because the mean of its divisors is an integer number (57886704).

Almost surely, 2^680750709 is an apocalyptic number.

It is an amenable number.

680750709 is a deficient number, since it is larger than the sum of its proper divisors (245436555).

680750709 is a wasteful number, since it uses less digits than its factorization.

680750709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6508.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 680750709 is about 26091.1998382596. The cubic root of 680750709 is about 879.6894173430.

The spelling of 680750709 in words is "six hundred eighty million, seven hundred fifty thousand, seven hundred nine".