9230906721 has 32 divisors (see below), whose sum is σ = 13259559168. Its totient is φ = 5691340800.

The previous prime is 9230906719. The next prime is 9230906731. The reversal of 9230906721 is 1276090329.

It is not a de Polignac number, because 9230906721 - 2¹ = 9230906719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9230906721.

It is not an unprimeable number, because it can be changed into a prime (9230906701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1026796 + ... + 1035746.

It is an arithmetic number, because the mean of its divisors is an integer number (414361224).

Almost surely, 2^9230906721 is an apocalyptic number.

It is an amenable number.

9230906721 is a deficient number, since it is larger than the sum of its proper divisors (4028652447).

9230906721 is a wasteful number, since it uses less digits than its factorization.

9230906721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9321.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 9230906721 is about 96077.6078022345. The cubic root of 9230906721 is about 2097.7229075103.

The spelling of 9230906721 in words is "nine billion, two hundred thirty million, nine hundred six thousand, seven hundred twenty-one".