6809739 has 16 divisors (see below), whose sum is σ = 9630720. Its totient is φ = 4272480.

The previous prime is 6809717. The next prime is 6809743. The reversal of 6809739 is 9379086.

It is a happy number.

It is not a de Polignac number, because 6809739 - 2⁷ = 6809611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6809739.

It is not an unprimeable number, because it can be changed into a prime (6809779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2452 + ... + 4430.

It is an arithmetic number, because the mean of its divisors is an integer number (601920).

Almost surely, 2^6809739 is an apocalyptic number.

6809739 is a deficient number, since it is larger than the sum of its proper divisors (2820981).

6809739 is a wasteful number, since it uses less digits than its factorization.

6809739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 6809739 is about 2609.5476619522. The cubic root of 6809739 is about 189.5440498354.

The spelling of 6809739 in words is "six million, eight hundred nine thousand, seven hundred thirty-nine".