809097011 has 4 divisors (see below), whose sum is σ = 809640432. Its totient is φ = 808553592.

The previous prime is 809097001. The next prime is 809097017. The reversal of 809097011 is 110790908.

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

It is a cyclic number.

It is not a de Polignac number, because 809097011 - 2¹⁴ = 809080627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809097017) 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, 269471 + ... + 272456.

It is an arithmetic number, because the mean of its divisors is an integer number (202410108).

Almost surely, 2^809097011 is an apocalyptic number.

809097011 is a deficient number, since it is larger than the sum of its proper divisors (543421).

809097011 is a wasteful number, since it uses less digits than its factorization.

809097011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543420.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 809097011 is about 28444.6306180973. The cubic root of 809097011 is about 931.8232283226.

The spelling of 809097011 in words is "eight hundred nine million, ninety-seven thousand, eleven".