232409 has 2 divisors, whose sum is σ = 232410. Its totient is φ = 232408.

The previous prime is 232391. The next prime is 232411. The reversal of 232409 is 904232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193600 + 38809 = 440^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 232409 - 2⁸ = 232153 is a prime.

It is a Sophie Germain prime.

Together with 232411, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (232439) 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 as a sum of consecutive naturals, namely, 116204 + 116205.

It is an arithmetic number, because the mean of its divisors is an integer number (116205).

2²³²⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

232409 is a deficient number, since it is larger than the sum of its proper divisors (1).

232409 is an equidigital number, since it uses as much as digits as its factorization.

232409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 232409 is about 482.0881662103. The cubic root of 232409 is about 61.4824238667.

The spelling of 232409 in words is "two hundred thirty-two thousand, four hundred nine".