6809609 has 4 divisors (see below), whose sum is σ = 6968016. Its totient is φ = 6651204.

The previous prime is 6809597. The next prime is 6809611. The reversal of 6809609 is 9069086.

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 a de Polignac number, because none of the positive numbers 2^k-6809609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6809629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79139 + ... + 79224.

It is an arithmetic number, because the mean of its divisors is an integer number (1742004).

Almost surely, 2^6809609 is an apocalyptic number.

It is an amenable number.

6809609 is a deficient number, since it is larger than the sum of its proper divisors (158407).

6809609 is a wasteful number, since it uses less digits than its factorization.

6809609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158406.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 6809609 is about 2609.5227533018. The cubic root of 6809609 is about 189.5428436764.

The spelling of 6809609 in words is "six million, eight hundred nine thousand, six hundred nine".