6729793821 has 16 divisors (see below), whose sum is σ = 10036097920. Its totient is φ = 4456814400.

The previous prime is 6729793793. The next prime is 6729793883. The reversal of 6729793821 is 1283979276.

It is a de Polignac number, because none of the positive numbers 2^k-6729793821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6729793921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821260 + ... + 829413.

It is an arithmetic number, because the mean of its divisors is an integer number (627256120).

Almost surely, 2^6729793821 is an apocalyptic number.

It is an amenable number.

6729793821 is a deficient number, since it is larger than the sum of its proper divisors (3306304099).

6729793821 is a wasteful number, since it uses less digits than its factorization.

6729793821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650833 (or 1650827 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 6729793821 is about 82035.3205698619. The cubic root of 6729793821 is about 1887.9938981245.

The spelling of 6729793821 in words is "six billion, seven hundred twenty-nine million, seven hundred ninety-three thousand, eight hundred twenty-one".