6865809 has 4 divisors (see below), whose sum is σ = 9154416. Its totient is φ = 4577204.

The previous prime is 6865769. The next prime is 6865847. The reversal of 6865809 is 9085686.

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 6865809 - 2⁸ = 6865553 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6865009) 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, 1144299 + ... + 1144304.

It is an arithmetic number, because the mean of its divisors is an integer number (2288604).

Almost surely, 2^6865809 is an apocalyptic number.

It is an amenable number.

6865809 is a deficient number, since it is larger than the sum of its proper divisors (2288607).

6865809 is a wasteful number, since it uses less digits than its factorization.

6865809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288606.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 6865809 is about 2620.2688793328. The cubic root of 6865809 is about 190.0628508598.

The spelling of 6865809 in words is "six million, eight hundred sixty-five thousand, eight hundred nine".