9929021973 has 16 divisors (see below), whose sum is σ = 14297465280. Its totient is φ = 6092849664.

The previous prime is 9929021969. The next prime is 9929021987. The reversal of 9929021973 is 3791209299.

It is a happy number.

9929021973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9929021973 - 2² = 9929021969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9929021923) 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, 346843 + ... + 374376.

It is an arithmetic number, because the mean of its divisors is an integer number (893591580).

Almost surely, 2^9929021973 is an apocalyptic number.

It is an amenable number.

9929021973 is a deficient number, since it is larger than the sum of its proper divisors (4368443307).

9929021973 is a wasteful number, since it uses less digits than its factorization.

9929021973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721588.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 9929021973 is about 99644.4778851292. The cubic root of 9929021973 is about 2149.3253317046.

The spelling of 9929021973 in words is "nine billion, nine hundred twenty-nine million, twenty-one thousand, nine hundred seventy-three".