6805309 has 16 divisors (see below), whose sum is σ = 8312832. Its totient is φ = 5444208.

The previous prime is 6805289. The next prime is 6805327. The reversal of 6805309 is 9035086.

It is not a de Polignac number, because 6805309 - 2⁷ = 6805181 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 (6805339) 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, 6432 + ... + 7414.

It is an arithmetic number, because the mean of its divisors is an integer number (519552).

Almost surely, 2^6805309 is an apocalyptic number.

It is an amenable number.

6805309 is a deficient number, since it is larger than the sum of its proper divisors (1507523).

6805309 is a wasteful number, since it uses less digits than its factorization.

6805309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 6805309 is about 2608.6987177518. The cubic root of 6805309 is about 189.5029389946.

The spelling of 6805309 in words is "six million, eight hundred five thousand, three hundred nine".