159903 has 12 divisors (see below), whose sum is σ = 234520. Its totient is φ = 104976.

The previous prime is 159899. The next prime is 159911. The reversal of 159903 is 309951.

It is not a de Polignac number, because 159903 - 2² = 159899 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 (159403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 900 + ... + 1062.

2¹⁵⁹⁹⁰³ is an apocalyptic number.

159903 is a deficient number, since it is larger than the sum of its proper divisors (74617).

159903 is a wasteful number, since it uses less digits than its factorization.

159903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 159903 is about 399.8787316175. The cubic root of 159903 is about 54.2773793429.

The spelling of 159903 in words is "one hundred fifty-nine thousand, nine hundred three".