6809709 has 4 divisors (see below), whose sum is σ = 9079616. Its totient is φ = 4539804.

The previous prime is 6809701. The next prime is 6809713. The reversal of 6809709 is 9079086.

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 not a de Polignac number, because 6809709 - 2³ = 6809701 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6809701) 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, 1134949 + ... + 1134954.

It is an arithmetic number, because the mean of its divisors is an integer number (2269904).

Almost surely, 2^6809709 is an apocalyptic number.

It is an amenable number.

6809709 is a deficient number, since it is larger than the sum of its proper divisors (2269907).

6809709 is a wasteful number, since it uses less digits than its factorization.

6809709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269906.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 6809709 is about 2609.5419138232. The cubic root of 6809709 is about 189.5437714924.

The spelling of 6809709 in words is "six million, eight hundred nine thousand, seven hundred nine".