809829703873 has 4 divisors (see below), whose sum is σ = 812085497280. Its totient is φ = 807573910468.

The previous prime is 809829703871. The next prime is 809829703883. The reversal of 809829703873 is 378307928908.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 809829703873 - 2¹ = 809829703871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809829703871) 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, 1127896165 + ... + 1127896882.

It is an arithmetic number, because the mean of its divisors is an integer number (203021374320).

Almost surely, 2^809829703873 is an apocalyptic number.

It is an amenable number.

809829703873 is a deficient number, since it is larger than the sum of its proper divisors (2255793407).

809829703873 is a wasteful number, since it uses less digits than its factorization.

809829703873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255793406.

The product of its (nonzero) digits is 36578304, while the sum is 64.

The spelling of 809829703873 in words is "eight hundred nine billion, eight hundred twenty-nine million, seven hundred three thousand, eight hundred seventy-three".