159009 has 4 divisors (see below), whose sum is σ = 212016. Its totient is φ = 106004.

The previous prime is 158993. The next prime is 159013. The reversal of 159009 is 900951.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 900951 = 3 ⋅300317.

It is a cyclic number.

It is not a de Polignac number, because 159009 - 2⁴ = 158993 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 159009.

It is not an unprimeable number, because it can be changed into a prime (159059) 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, 26499 + ... + 26504.

It is an arithmetic number, because the mean of its divisors is an integer number (53004).

2¹⁵⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

159009 is a deficient number, since it is larger than the sum of its proper divisors (53007).

159009 is an equidigital number, since it uses as much as digits as its factorization.

159009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53006.

The product of its (nonzero) digits is 405, while the sum is 24.

The square root of 159009 is about 398.7593259098. The cubic root of 159009 is about 54.1760373006.

The spelling of 159009 in words is "one hundred fifty-nine thousand, nine".