809948023 has 2 divisors, whose sum is σ = 809948024. Its totient is φ = 809948022.

The previous prime is 809948011. The next prime is 809948077. The reversal of 809948023 is 320849908.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 809948023 - 2⁵ = 809947991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809948003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404974011 + 404974012.

It is an arithmetic number, because the mean of its divisors is an integer number (404974012).

Almost surely, 2^809948023 is an apocalyptic number.

809948023 is a deficient number, since it is larger than the sum of its proper divisors (1).

809948023 is an equidigital number, since it uses as much as digits as its factorization.

809948023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 809948023 is about 28459.5857840553. The cubic root of 809948023 is about 932.1498125172.

The spelling of 809948023 in words is "eight hundred nine million, nine hundred forty-eight thousand, twenty-three".