809801 has 2 divisors, whose sum is σ = 809802. Its totient is φ = 809800.

The previous prime is 809797. The next prime is 809803. The reversal of 809801 is 108908.

809801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 808201 + 1600 = 899^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 809801 - 2² = 809797 is a prime.

It is a Sophie Germain prime.

Together with 809803, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (809803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404900 + 404901.

It is an arithmetic number, because the mean of its divisors is an integer number (404901).

2⁸⁰⁹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

809801 is a deficient number, since it is larger than the sum of its proper divisors (1).

809801 is an equidigital number, since it uses as much as digits as its factorization.

809801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 809801 is about 899.8894376533. The cubic root of 809801 is about 93.2093407352.

The spelling of 809801 in words is "eight hundred nine thousand, eight hundred one".