9679980021 has 16 divisors (see below), whose sum is σ = 13033073664. Its totient is φ = 6390157424.

The previous prime is 9679980007. The next prime is 9679980029. The reversal of 9679980021 is 1200899769.

It is a happy number.

9679980021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9679980021 - 2⁶ = 9679979957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9679980029) 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 15 ways as a sum of consecutive naturals, for example, 907300 + ... + 917906.

It is an arithmetic number, because the mean of its divisors is an integer number (814567104).

Almost surely, 2^9679980021 is an apocalyptic number.

It is an amenable number.

9679980021 is a deficient number, since it is larger than the sum of its proper divisors (3353093643).

9679980021 is a wasteful number, since it uses less digits than its factorization.

9679980021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 9679980021 is about 98386.8894772063. The cubic root of 9679980021 is about 2131.2030073017.

The spelling of 9679980021 in words is "nine billion, six hundred seventy-nine million, nine hundred eighty thousand, twenty-one".