706809 has 8 divisors (see below), whose sum is σ = 997920. Its totient is φ = 443456.

The previous prime is 706801. The next prime is 706829. The reversal of 706809 is 908607.

It is a happy number.

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 706809 - 2³ = 706801 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 706809.

It is not an unprimeable number, because it can be changed into a prime (706801) 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, 6879 + ... + 6980.

It is an arithmetic number, because the mean of its divisors is an integer number (124740).

2⁷⁰⁶⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

706809 is a deficient number, since it is larger than the sum of its proper divisors (291111).

706809 is a wasteful number, since it uses less digits than its factorization.

706809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13879.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 706809 is about 840.7193348556. The cubic root of 706809 is about 89.0773640319.

The spelling of 706809 in words is "seven hundred six thousand, eight hundred nine".