809829703871 has 2 divisors, whose sum is σ = 809829703872. Its totient is φ = 809829703870.

The previous prime is 809829703847. The next prime is 809829703883. The reversal of 809829703871 is 178307928908.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-809829703871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809829703271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404914851935 + 404914851936.

It is an arithmetic number, because the mean of its divisors is an integer number (404914851936).

Almost surely, 2^809829703871 is an apocalyptic number.

809829703871 is a deficient number, since it is larger than the sum of its proper divisors (1).

809829703871 is an equidigital number, since it uses as much as digits as its factorization.

809829703871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 62.

The spelling of 809829703871 in words is "eight hundred nine billion, eight hundred twenty-nine million, seven hundred three thousand, eight hundred seventy-one".