158609 has 4 divisors (see below), whose sum is σ = 173040. Its totient is φ = 144180.

The previous prime is 158597. The next prime is 158611. The reversal of 158609 is 906851.

158609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-158609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158699) 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, 7199 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (43260).

2¹⁵⁸⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

158609 is a deficient number, since it is larger than the sum of its proper divisors (14431).

158609 is a wasteful number, since it uses less digits than its factorization.

158609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14430.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 158609 is about 398.2574544186. The cubic root of 158609 is about 54.1305710868.

It can be divided in two parts, 158 and 609, that added together give a palindrome (767).

The spelling of 158609 in words is "one hundred fifty-eight thousand, six hundred nine".