235609 has 4 divisors (see below), whose sum is σ = 257040. Its totient is φ = 214180.

The previous prime is 235607. The next prime is 235621. The reversal of 235609 is 906532.

235609 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 not a de Polignac number, because 235609 - 2¹ = 235607 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (235601) 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, 10699 + ... + 10720.

It is an arithmetic number, because the mean of its divisors is an integer number (64260).

2²³⁵⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

235609 is a deficient number, since it is larger than the sum of its proper divisors (21431).

235609 is a wasteful number, since it uses less digits than its factorization.

235609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21430.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 235609 is about 485.3957148554. The cubic root of 235609 is about 61.7633189320.

The spelling of 235609 in words is "two hundred thirty-five thousand, six hundred nine".