233391 has 4 divisors (see below), whose sum is σ = 311192. Its totient is φ = 155592.

The previous prime is 233371. The next prime is 233407. The reversal of 233391 is 193332.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 233391 - 2⁶ = 233327 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38896 + ... + 38901.

It is an arithmetic number, because the mean of its divisors is an integer number (77798).

2²³³³⁹¹ is an apocalyptic number.

233391 is a deficient number, since it is larger than the sum of its proper divisors (77801).

233391 is an equidigital number, since it uses as much as digits as its factorization.

233391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77800.

The product of its digits is 486, while the sum is 21.

The square root of 233391 is about 483.1055785230. The cubic root of 233391 is about 61.5688962837.

The spelling of 233391 in words is "two hundred thirty-three thousand, three hundred ninety-one".