230909 has 4 divisors (see below), whose sum is σ = 263904. Its totient is φ = 197916.

The previous prime is 230891. The next prime is 230929. The reversal of 230909 is 909032.

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 not a de Polignac number, because 230909 - 2⁸ = 230653 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

230909 is a modest number, since divided by 909 gives 23 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230929) 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, 16487 + ... + 16500.

It is an arithmetic number, because the mean of its divisors is an integer number (65976).

2²³⁰⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

230909 is a deficient number, since it is larger than the sum of its proper divisors (32995).

230909 is an equidigital number, since it uses as much as digits as its factorization.

230909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32994.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 230909 is about 480.5299158221. The cubic root of 230909 is about 61.3498662372.

The spelling of 230909 in words is "two hundred thirty thousand, nine hundred nine".