9930856321 has 4 divisors (see below), whose sum is σ = 10161806512. Its totient is φ = 9699906132.

The previous prime is 9930856307. The next prime is 9930856363. The reversal of 9930856321 is 1236580399.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1236580399 = 241 ⋅5131039.

It is a cyclic number.

It is not a de Polignac number, because 9930856321 - 2¹⁹ = 9930332033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9930856381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115475031 + ... + 115475116.

It is an arithmetic number, because the mean of its divisors is an integer number (2540451628).

Almost surely, 2^9930856321 is an apocalyptic number.

It is an amenable number.

9930856321 is a deficient number, since it is larger than the sum of its proper divisors (230950191).

9930856321 is a wasteful number, since it uses less digits than its factorization.

9930856321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230950190.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 9930856321 is about 99653.6819239510. The cubic root of 9930856321 is about 2149.4576833724.

The spelling of 9930856321 in words is "nine billion, nine hundred thirty million, eight hundred fifty-six thousand, three hundred twenty-one".