843728208673 has 4 divisors (see below), whose sum is σ = 964260809920. Its totient is φ = 723195607428.

The previous prime is 843728208629. The next prime is 843728208709. The reversal of 843728208673 is 376802827348.

It is a happy number.

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 not a de Polignac number, because 843728208673 - 2⁹ = 843728208161 is a prime.

It is a super-2 number, since 2×843728208673² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (843728208773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60266300613 + ... + 60266300626.

It is an arithmetic number, because the mean of its divisors is an integer number (241065202480).

Almost surely, 2^843728208673 is an apocalyptic number.

It is an amenable number.

843728208673 is a deficient number, since it is larger than the sum of its proper divisors (120532601247).

843728208673 is a wasteful number, since it uses less digits than its factorization.

843728208673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120532601246.

The product of its (nonzero) digits is 21676032, while the sum is 58.

The spelling of 843728208673 in words is "eight hundred forty-three billion, seven hundred twenty-eight million, two hundred eight thousand, six hundred seventy-three".