307680809 has 4 divisors (see below), whose sum is σ = 309894480. Its totient is φ = 305467140.

The previous prime is 307680803. The next prime is 307680869. The reversal of 307680809 is 908086703.

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 307680809 - 2⁸ = 307680553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (307680803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106627 + ... + 1106904.

It is an arithmetic number, because the mean of its divisors is an integer number (77473620).

Almost surely, 2^307680809 is an apocalyptic number.

It is an amenable number.

307680809 is a deficient number, since it is larger than the sum of its proper divisors (2213671).

307680809 is a wasteful number, since it uses less digits than its factorization.

307680809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213670.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 307680809 is about 17540.8326199186. The cubic root of 307680809 is about 675.0979713305.

The spelling of 307680809 in words is "three hundred seven million, six hundred eighty thousand, eight hundred nine".