6809705 has 16 divisors (see below), whose sum is σ = 9517824. Its totient is φ = 4580160.

The previous prime is 6809701. The next prime is 6809713. The reversal of 6809705 is 5079086.

It is not a de Polignac number, because 6809705 - 2² = 6809701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6809701) 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, 20 + ... + 3690.

It is an arithmetic number, because the mean of its divisors is an integer number (594864).

Almost surely, 2^6809705 is an apocalyptic number.

It is an amenable number.

6809705 is a deficient number, since it is larger than the sum of its proper divisors (2708119).

6809705 is a wasteful number, since it uses less digits than its factorization.

6809705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 6809705 is about 2609.5411474050. The cubic root of 6809705 is about 189.5437343799.

The spelling of 6809705 in words is "six million, eight hundred nine thousand, seven hundred five".