159959 has 4 divisors (see below), whose sum is σ = 161616. Its totient is φ = 158304.

The previous prime is 159937. The next prime is 159977. The reversal of 159959 is 959951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 959951 = 23 ⋅41737.

It is a cyclic number.

It is not a de Polignac number, because 159959 - 2¹² = 155863 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159979) 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, 674 + ... + 879.

It is an arithmetic number, because the mean of its divisors is an integer number (40404).

2¹⁵⁹⁹⁵⁹ is an apocalyptic number.

159959 is a deficient number, since it is larger than the sum of its proper divisors (1657).

159959 is a wasteful number, since it uses less digits than its factorization.

159959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656.

The product of its digits is 18225, while the sum is 38.

The square root of 159959 is about 399.9487467164. The cubic root of 159959 is about 54.2837148057.

The spelling of 159959 in words is "one hundred fifty-nine thousand, nine hundred fifty-nine".