889920921 has 8 divisors (see below), whose sum is σ = 1187139744. Its totient is φ = 592991360.

The previous prime is 889920919. The next prime is 889920943. The reversal of 889920921 is 129029988.

889920921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 889920921 - 2¹ = 889920919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (889920961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65031 + ... + 77516.

It is an arithmetic number, because the mean of its divisors is an integer number (148392468).

Almost surely, 2^889920921 is an apocalyptic number.

It is an amenable number.

889920921 is a deficient number, since it is larger than the sum of its proper divisors (297218823).

889920921 is a wasteful number, since it uses less digits than its factorization.

889920921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144631.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 889920921 is about 29831.5423838594. The cubic root of 889920921 is about 961.8716815865.

The spelling of 889920921 in words is "eight hundred eighty-nine million, nine hundred twenty thousand, nine hundred twenty-one".