806727609 has 6 divisors (see below), whose sum is σ = 1165273226. Its totient is φ = 537818400.

The previous prime is 806727583. The next prime is 806727619. The reversal of 806727609 is 906727608.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 806276025 + 451584 = 28395^2 + 672^2 .

It is not a de Polignac number, because 806727609 - 2⁵ = 806727577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (806727619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44818192 + ... + 44818209.

Almost surely, 2^806727609 is an apocalyptic number.

It is an amenable number.

806727609 is a deficient number, since it is larger than the sum of its proper divisors (358545617).

806727609 is a wasteful number, since it uses less digits than its factorization.

806727609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89636407 (or 89636404 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 806727609 is about 28402.9507093893. The cubic root of 806727609 is about 930.9127390109.

Subtracting 806727609 from its reverse (906727608), we obtain a palindrome (99999999).

The spelling of 806727609 in words is "eight hundred six million, seven hundred twenty-seven thousand, six hundred nine".