159891887 has 4 divisors (see below), whose sum is σ = 160457160. Its totient is φ = 159326616.

The previous prime is 159891871. The next prime is 159891889. The reversal of 159891887 is 788198951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788198951 = 103 ⋅7652417.

It is a cyclic number.

It is not a de Polignac number, because 159891887 - 2⁴ = 159891871 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 (159891889) 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, 282212 + ... + 282777.

It is an arithmetic number, because the mean of its divisors is an integer number (40114290).

Almost surely, 2^159891887 is an apocalyptic number.

159891887 is a deficient number, since it is larger than the sum of its proper divisors (565273).

159891887 is an equidigital number, since it uses as much as digits as its factorization.

159891887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565272.

The product of its digits is 1451520, while the sum is 56.

The square root of 159891887 is about 12644.8363769564. The cubic root of 159891887 is about 542.7612191710.

The spelling of 159891887 in words is "one hundred fifty-nine million, eight hundred ninety-one thousand, eight hundred eighty-seven".