889901109987 has 16 divisors (see below), whose sum is σ = 1219056911520. Its totient is φ = 577018294272.

The previous prime is 889901109931. The next prime is 889901109991. The reversal of 889901109987 is 789901109988.

It is not a de Polignac number, because 889901109987 - 2⁷ = 889901109859 is a prime.

It is a super-2 number, since 2×889901109987² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (889901109187) 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, 1192248 + ... + 1789205.

It is an arithmetic number, because the mean of its divisors is an integer number (76191056970).

Almost surely, 2^889901109987 is an apocalyptic number.

889901109987 is a deficient number, since it is larger than the sum of its proper divisors (329155801533).

889901109987 is a wasteful number, since it uses less digits than its factorization.

889901109987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984182.

The product of its (nonzero) digits is 23514624, while the sum is 69.

Subtracting from 889901109987 its reverse (789901109988), we obtain a palindrome (99999999999).

The spelling of 889901109987 in words is "eight hundred eighty-nine billion, nine hundred one million, one hundred nine thousand, nine hundred eighty-seven".