6739809 has 8 divisors (see below), whose sum is σ = 9229440. Its totient is φ = 4371696.

The previous prime is 6739807. The next prime is 6739877. The reversal of 6739809 is 9089376.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6739809 - 2¹ = 6739807 is a prime.

6739809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6739801) 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 7 ways as a sum of consecutive naturals, for example, 30249 + ... + 30470.

It is an arithmetic number, because the mean of its divisors is an integer number (1153680).

Almost surely, 2^6739809 is an apocalyptic number.

It is an amenable number.

6739809 is a deficient number, since it is larger than the sum of its proper divisors (2489631).

6739809 is a wasteful number, since it uses less digits than its factorization.

6739809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60759.

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

The square root of 6739809 is about 2596.1142116633. The cubic root of 6739809 is about 188.8929995389.

The spelling of 6739809 in words is "six million, seven hundred thirty-nine thousand, eight hundred nine".