8927231721 has 16 divisors (see below), whose sum is σ = 12425091648. Its totient is φ = 5695704000.

The previous prime is 8927231699. The next prime is 8927231741. The reversal of 8927231721 is 1271327298.

8927231721 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 8927231721 - 2⁵ = 8927231689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8927231741) 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, 652455 + ... + 665996.

It is an arithmetic number, because the mean of its divisors is an integer number (776568228).

Almost surely, 2^8927231721 is an apocalyptic number.

It is an amenable number.

8927231721 is a deficient number, since it is larger than the sum of its proper divisors (3497859927).

8927231721 is a wasteful number, since it uses less digits than its factorization.

8927231721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318552.

The product of its digits is 84672, while the sum is 42.

The square root of 8927231721 is about 94484.0289202360. The cubic root of 8927231721 is about 2074.4625672358.

The spelling of 8927231721 in words is "eight billion, nine hundred twenty-seven million, two hundred thirty-one thousand, seven hundred twenty-one".