6809791 has 4 divisors (see below), whose sum is σ = 6825952. Its totient is φ = 6793632.

The previous prime is 6809779. The next prime is 6809797. The reversal of 6809791 is 1979086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6809791 - 2⁹ = 6809279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6809797) 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, 7431 + ... + 8296.

It is an arithmetic number, because the mean of its divisors is an integer number (1706488).

Almost surely, 2^6809791 is an apocalyptic number.

6809791 is a deficient number, since it is larger than the sum of its proper divisors (16161).

6809791 is a wasteful number, since it uses less digits than its factorization.

6809791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16160.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 6809791 is about 2609.5576253457. The cubic root of 6809791 is about 189.5445322947.

The spelling of 6809791 in words is "six million, eight hundred nine thousand, seven hundred ninety-one".