159899889 has 4 divisors (see below), whose sum is σ = 213199856. Its totient is φ = 106599924.

The previous prime is 159899879. The next prime is 159899893. The reversal of 159899889 is 988998951.

159899889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 159899889 - 2²⁷ = 25682161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159899879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26649979 + ... + 26649984.

It is an arithmetic number, because the mean of its divisors is an integer number (53299964).

Almost surely, 2^159899889 is an apocalyptic number.

It is an amenable number.

159899889 is a deficient number, since it is larger than the sum of its proper divisors (53299967).

159899889 is an equidigital number, since it uses as much as digits as its factorization.

159899889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53299966.

The product of its digits is 16796160, while the sum is 66.

The square root of 159899889 is about 12645.1527867401. The cubic root of 159899889 is about 542.7702734199.

It can be divided in two parts, 15989 and 9889, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 159899889 in words is "one hundred fifty-nine million, eight hundred ninety-nine thousand, eight hundred eighty-nine".