9721984092 has 12 divisors (see below), whose sum is σ = 22684629576. Its totient is φ = 3240661360.

The previous prime is 9721984061. The next prime is 9721984093. The reversal of 9721984092 is 2904891279.

9721984092 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721984093) 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, 405082659 + ... + 405082682.

It is an arithmetic number, because the mean of its divisors is an integer number (1890385798).

Almost surely, 2^9721984092 is an apocalyptic number.

It is an amenable number.

9721984092 is an abundant number, since it is smaller than the sum of its proper divisors (12962645484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9721984092 is a wasteful number, since it uses less digits than its factorization.

9721984092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810165348 (or 810165346 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 9721984092 is about 98600.1221703097. The cubic root of 9721984092 is about 2134.2811827644.

The spelling of 9721984092 in words is "nine billion, seven hundred twenty-one million, nine hundred eighty-four thousand, ninety-two".