680279909 has 8 divisors (see below), whose sum is σ = 697410912. Its totient is φ = 663208560.

The previous prime is 680279893. The next prime is 680279911. The reversal of 680279909 is 909972086.

680279909 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 a cyclic number.

It is not a de Polignac number, because 680279909 - 2⁴ = 680279893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680279989) 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, 8642 + ... + 37884.

It is an arithmetic number, because the mean of its divisors is an integer number (87176364).

Almost surely, 2^680279909 is an apocalyptic number.

It is an amenable number.

680279909 is a deficient number, since it is larger than the sum of its proper divisors (17131003).

680279909 is a wasteful number, since it uses less digits than its factorization.

680279909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29827.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 680279909 is about 26082.1760786940. The cubic root of 680279909 is about 879.4865759384.

The spelling of 680279909 in words is "six hundred eighty million, two hundred seventy-nine thousand, nine hundred nine".