806809 has 8 divisors (see below), whose sum is σ = 855360. Its totient is φ = 759696.

The previous prime is 806807. The next prime is 806821. The reversal of 806809 is 908608.

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

It is a cyclic number.

It is not a de Polignac number, because 806809 - 2¹ = 806807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924 + ... + 1570.

It is an arithmetic number, because the mean of its divisors is an integer number (106920).

2⁸⁰⁶⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

806809 is a deficient number, since it is larger than the sum of its proper divisors (48551).

806809 is a wasteful number, since it uses less digits than its factorization.

806809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 806809 is about 898.2254728074. The cubic root of 806809 is about 93.0944044650.

It can be divided in two parts, 80 and 6809, that added together give a square (6889 = 83²).

The spelling of 806809 in words is "eight hundred six thousand, eight hundred nine".