6806409 has 16 divisors (see below), whose sum is σ = 9871488. Its totient is φ = 4154112.

The previous prime is 6806407. The next prime is 6806411. The reversal of 6806409 is 9046086.

6806409 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6806407) and next prime (6806411).

It is not a de Polignac number, because 6806409 - 2¹ = 6806407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6806409.

It is not an unprimeable number, because it can be changed into a prime (6806407) 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, 84 + ... + 3690.

It is an arithmetic number, because the mean of its divisors is an integer number (616968).

Almost surely, 2^6806409 is an apocalyptic number.

It is an amenable number.

6806409 is a deficient number, since it is larger than the sum of its proper divisors (3065079).

6806409 is a wasteful number, since it uses less digits than its factorization.

6806409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 6806409 is about 2608.9095423184. The cubic root of 6806409 is about 189.5131487687.

The spelling of 6806409 in words is "six million, eight hundred six thousand, four hundred nine".