159021609 has 16 divisors (see below), whose sum is σ = 223921152. Its totient is φ = 100179728.

The previous prime is 159021607. The next prime is 159021617. The reversal of 159021609 is 906120951.

It is a cyclic number.

It is not a de Polignac number, because 159021609 - 2¹ = 159021607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 159021609.

It is not an unprimeable number, because it can be changed into a prime (159021607) 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, 8157 + ... + 19610.

It is an arithmetic number, because the mean of its divisors is an integer number (13995072).

Almost surely, 2^159021609 is an apocalyptic number.

It is an amenable number.

159021609 is a deficient number, since it is larger than the sum of its proper divisors (64899543).

159021609 is a wasteful number, since it uses less digits than its factorization.

159021609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27876.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 159021609 is about 12610.3770363935. The cubic root of 159021609 is about 541.7746926900.

The spelling of 159021609 in words is "one hundred fifty-nine million, twenty-one thousand, six hundred nine".