229809 has 4 divisors (see below), whose sum is σ = 306416. Its totient is φ = 153204.

The previous prime is 229799. The next prime is 229813. The reversal of 229809 is 908922.

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 not a de Polignac number, because 229809 - 2⁵ = 229777 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (229819) 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, 38299 + ... + 38304.

It is an arithmetic number, because the mean of its divisors is an integer number (76604).

2²²⁹⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

229809 is a deficient number, since it is larger than the sum of its proper divisors (76607).

229809 is an equidigital number, since it uses as much as digits as its factorization.

229809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76606.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 229809 is about 479.3839797073. The cubic root of 229809 is about 61.2522920147.

The spelling of 229809 in words is "two hundred twenty-nine thousand, eight hundred nine".