233139 has 4 divisors (see below), whose sum is σ = 310856. Its totient is φ = 155424.

The previous prime is 233117. The next prime is 233141. The reversal of 233139 is 931332.

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

It is not a de Polignac number, because 233139 - 2¹³ = 224947 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 233139.

It is not an unprimeable number, because it can be changed into a prime (233159) 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 3 ways as a sum of consecutive naturals, for example, 38854 + ... + 38859.

It is an arithmetic number, because the mean of its divisors is an integer number (77714).

2²³³¹³⁹ is an apocalyptic number.

233139 is a deficient number, since it is larger than the sum of its proper divisors (77717).

233139 is an equidigital number, since it uses as much as digits as its factorization.

233139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77716.

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

The square root of 233139 is about 482.8446955285. The cubic root of 233139 is about 61.5467289774.

It can be divided in two parts, 2331 and 39, that multiplied together give a palindrome (90909).

The spelling of 233139 in words is "two hundred thirty-three thousand, one hundred thirty-nine".