809097001 has 2 divisors, whose sum is σ = 809097002. Its totient is φ = 809097000.

The previous prime is 809096999. The next prime is 809097017. The reversal of 809097001 is 100790908.

809097001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562638400 + 246458601 = 23720^2 + 15699^2 .

It is a cyclic number.

It is not a de Polignac number, because 809097001 - 2¹ = 809096999 is a prime.

Together with 809096999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (809091001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404548500 + 404548501.

It is an arithmetic number, because the mean of its divisors is an integer number (404548501).

Almost surely, 2^809097001 is an apocalyptic number.

It is an amenable number.

809097001 is a deficient number, since it is larger than the sum of its proper divisors (1).

809097001 is an equidigital number, since it uses as much as digits as its factorization.

809097001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 809097001 is about 28444.6304423172. The cubic root of 809097001 is about 931.8232244837.

The spelling of 809097001 in words is "eight hundred nine million, ninety-seven thousand, one".