9380399721 has 24 divisors (see below), whose sum is σ = 15871847904. Its totient is φ = 4872934080.

The previous prime is 9380399701. The next prime is 9380399737. The reversal of 9380399721 is 1279930839.

It is a happy number.

9380399721 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 9380399721 - 2⁶ = 9380399657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9380399701) 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 23 ways as a sum of consecutive naturals, for example, 2898940 + ... + 2902173.

It is an arithmetic number, because the mean of its divisors is an integer number (661326996).

Almost surely, 2^9380399721 is an apocalyptic number.

It is an amenable number.

9380399721 is a deficient number, since it is larger than the sum of its proper divisors (6491448183).

9380399721 is a wasteful number, since it uses less digits than its factorization.

9380399721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5801141 (or 5801134 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 9380399721 is about 96852.4636805900. The cubic root of 9380399721 is about 2108.9864123187.

The spelling of 9380399721 in words is "nine billion, three hundred eighty million, three hundred ninety-nine thousand, seven hundred twenty-one".