232309 has 12 divisors (see below), whose sum is σ = 295488. Its totient is φ = 180600.

The previous prime is 232307. The next prime is 232333. The reversal of 232309 is 903232.

It is not a de Polignac number, because 232309 - 2¹ = 232307 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324 + ... + 754.

It is an arithmetic number, because the mean of its divisors is an integer number (24624).

2²³²³⁰⁹ is an apocalyptic number.

It is an amenable number.

232309 is a deficient number, since it is larger than the sum of its proper divisors (63179).

232309 is a wasteful number, since it uses less digits than its factorization.

232309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 232309 is about 481.9844395829. The cubic root of 232309 is about 61.4736044658.

It can be divided in two parts, 23 and 2309, that added together give a palindrome (2332).

The spelling of 232309 in words is "two hundred thirty-two thousand, three hundred nine".