6809491 has 16 divisors (see below), whose sum is σ = 7721728. Its totient is φ = 5961600.

The previous prime is 6809483. The next prime is 6809507. The reversal of 6809491 is 1949086.

It is a cyclic number.

It is not a de Polignac number, because 6809491 - 2³ = 6809483 is a prime.

It is an Ulam number.

It is the 2610-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 6809491.

It is not an unprimeable number, because it can be changed into a prime (6809191) by changing a digit.

It is a nontrivial repunit in base 2609.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24445 + ... + 24721.

It is an arithmetic number, because the mean of its divisors is an integer number (482608).

Almost surely, 2^6809491 is an apocalyptic number.

6809491 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6809491 is a deficient number, since it is larger than the sum of its proper divisors (912237).

6809491 is a wasteful number, since it uses less digits than its factorization.

6809491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 6809491 is about 2609.5001437057. The cubic root of 6809491 is about 189.5417488419.

The spelling of 6809491 in words is "six million, eight hundred nine thousand, four hundred ninety-one".