806691 has 4 divisors (see below), whose sum is σ = 1075592. Its totient is φ = 537792.

The previous prime is 806671. The next prime is 806719. The reversal of 806691 is 196608.

806691 is nontrivially palindromic in base 2.

806691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-806691 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134446 + ... + 134451.

It is an arithmetic number, because the mean of its divisors is an integer number (268898).

2⁸⁰⁶⁶⁹¹ is an apocalyptic number.

806691 is a deficient number, since it is larger than the sum of its proper divisors (268901).

806691 is a wasteful number, since it uses less digits than its factorization.

806691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268900.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 806691 is about 898.1597853389. The cubic root of 806691 is about 93.0898657306.

The spelling of 806691 in words is "eight hundred six thousand, six hundred ninety-one".