809011697 has 16 divisors (see below), whose sum is σ = 941895360. Its totient is φ = 688347072.

The previous prime is 809011661. The next prime is 809011711. The reversal of 809011697 is 796110908.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 809011697 - 2¹⁰ = 809010673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (809011297) 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, 35123 + ... + 53400.

It is an arithmetic number, because the mean of its divisors is an integer number (58868460).

Almost surely, 2^809011697 is an apocalyptic number.

It is an amenable number.

809011697 is a deficient number, since it is larger than the sum of its proper divisors (132883663).

809011697 is a wasteful number, since it uses less digits than its factorization.

809011697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88592.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 809011697 is about 28443.1309282224. The cubic root of 809011697 is about 931.7904756118.

The spelling of 809011697 in words is "eight hundred nine million, eleven thousand, six hundred ninety-seven".