9930930921 has 12 divisors (see below), whose sum is σ = 14349058672. Its totient is φ = 6618598776.

The previous prime is 9930930899. The next prime is 9930930931. The reversal of 9930930921 is 1290390399.

9930930921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-9930930921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9930930931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137071 + ... + 196596.

Almost surely, 2^9930930921 is an apocalyptic number.

It is an amenable number.

9930930921 is a deficient number, since it is larger than the sum of its proper divisors (4418127751).

9930930921 is a wasteful number, since it uses less digits than its factorization.

9930930921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336980 (or 336977 counting only the distinct ones).

The product of its (nonzero) digits is 118098, while the sum is 45.

The square root of 9930930921 is about 99654.0562195037. The cubic root of 9930930921 is about 2149.4630655582.

The spelling of 9930930921 in words is "nine billion, nine hundred thirty million, nine hundred thirty thousand, nine hundred twenty-one".