889969989 has 8 divisors (see below), whose sum is σ = 1192590400. Its totient is φ = 590331456.

The previous prime is 889969973. The next prime is 889969999. The reversal of 889969989 is 989969988.

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

It is not a de Polignac number, because 889969989 - 2⁴ = 889969973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 889969989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (889969939) 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, 744772 + ... + 745965.

It is an arithmetic number, because the mean of its divisors is an integer number (149073800).

Almost surely, 2^889969989 is an apocalyptic number.

It is an amenable number.

889969989 is a deficient number, since it is larger than the sum of its proper divisors (302620411).

889969989 is a wasteful number, since it uses less digits than its factorization.

889969989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490939.

The product of its digits is 181398528, while the sum is 75.

The square root of 889969989 is about 29832.3647906095. The cubic root of 889969989 is about 961.8893596562.

Subtracting 889969989 from its reverse (989969988), we obtain a palindrome (99999999).

The spelling of 889969989 in words is "eight hundred eighty-nine million, nine hundred sixty-nine thousand, nine hundred eighty-nine".