159009891 has 16 divisors (see below), whose sum is σ = 224841600. Its totient is φ = 99612288.

The previous prime is 159009889. The next prime is 159009899. The reversal of 159009891 is 198900951.

159009891 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 159009891 - 2¹ = 159009889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (159009899) 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, 35580 + ... + 39798.

It is an arithmetic number, because the mean of its divisors is an integer number (14052600).

Almost surely, 2^159009891 is an apocalyptic number.

159009891 is a deficient number, since it is larger than the sum of its proper divisors (65831709).

159009891 is a wasteful number, since it uses less digits than its factorization.

159009891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978.

The product of its (nonzero) digits is 29160, while the sum is 42.

The square root of 159009891 is about 12609.9124104809. The cubic root of 159009891 is about 541.7613849142.

The spelling of 159009891 in words is "one hundred fifty-nine million, nine thousand, eight hundred ninety-one".