889901109989 has 16 divisors (see below), whose sum is σ = 976928242176. Its totient is φ = 806965363200.

The previous prime is 889901109931. The next prime is 889901109991. The reversal of 889901109989 is 989901109988.

It is a cyclic number.

It is not a de Polignac number, because 889901109989 - 2²⁴ = 889884332773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889901109919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3599792 + ... + 3839049.

It is an arithmetic number, because the mean of its divisors is an integer number (61058015136).

Almost surely, 2^889901109989 is an apocalyptic number.

It is an amenable number.

889901109989 is a deficient number, since it is larger than the sum of its proper divisors (87027132187).

889901109989 is a wasteful number, since it uses less digits than its factorization.

889901109989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439116.

The product of its (nonzero) digits is 30233088, while the sum is 71.

Subtracting 889901109989 from its reverse (989901109988), we obtain a palindrome (99999999999).

The spelling of 889901109989 in words is "eight hundred eighty-nine billion, nine hundred one million, one hundred nine thousand, nine hundred eighty-nine".