9884958721 has 4 divisors (see below), whose sum is σ = 10783591344. Its totient is φ = 8986326100.

The previous prime is 9884958697. The next prime is 9884958731. The reversal of 9884958721 is 1278594889.

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.

It is a cyclic number.

It is not a de Polignac number, because 9884958721 - 2¹³ = 9884950529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9884958721.

It is not an unprimeable number, because it can be changed into a prime (9884958731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449316295 + ... + 449316316.

It is an arithmetic number, because the mean of its divisors is an integer number (2695897836).

Almost surely, 2^9884958721 is an apocalyptic number.

It is an amenable number.

9884958721 is a deficient number, since it is larger than the sum of its proper divisors (898632623).

9884958721 is a wasteful number, since it uses less digits than its factorization.

9884958721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898632622.

The product of its digits is 11612160, while the sum is 61.

The square root of 9884958721 is about 99423.1297083330. The cubic root of 9884958721 is about 2146.1411742927.

The spelling of 9884958721 in words is "nine billion, eight hundred eighty-four million, nine hundred fifty-eight thousand, seven hundred twenty-one".