9905889 has 24 divisors (see below), whose sum is σ = 15576960. Its totient is φ = 5582304.

The previous prime is 9905879. The next prime is 9905891. The reversal of 9905889 is 9885099.

9905889 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 9905889 - 2⁹ = 9905377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9905839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11187 + ... + 12039.

It is an arithmetic number, because the mean of its divisors is an integer number (649040).

Almost surely, 2^9905889 is an apocalyptic number.

It is an amenable number.

9905889 is a deficient number, since it is larger than the sum of its proper divisors (5671071).

9905889 is a wasteful number, since it uses less digits than its factorization.

9905889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 48.

The square root of 9905889 is about 3147.3622289149. The cubic root of 9905889 is about 214.7654843299.

The spelling of 9905889 in words is "nine million, nine hundred five thousand, eight hundred eighty-nine".