158809 has 8 divisors (see below), whose sum is σ = 185600. Its totient is φ = 135828.

The previous prime is 158803. The next prime is 158843. The reversal of 158809 is 908851.

158809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 158809 - 2⁵ = 158777 is a prime.

It is a Duffinian number.

158809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (158803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112 + ... + 574.

It is an arithmetic number, because the mean of its divisors is an integer number (23200).

2¹⁵⁸⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

158809 is a deficient number, since it is larger than the sum of its proper divisors (26791).

158809 is an frugal number, since it uses more digits than its factorization.

158809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 158809 is about 398.5084691697. The cubic root of 158809 is about 54.1533137368.

The spelling of 158809 in words is "one hundred fifty-eight thousand, eight hundred nine".