23291 has 2 divisors, whose sum is σ = 23292.
Its totient is φ = 23290.
The previous prime is 23279. The next prime is 23293. The reversal of 23291 is 19232.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 23291 - 26 = 23227 is a prime.
Together with 23293, it forms a pair of twin primes.
It is a Chen prime.
It is a plaindrome in base 12.
It is not a weakly prime, because it can be changed into another prime (23293) 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, 11645 + 11646.
It is an arithmetic number, because the mean of its divisors is an integer number (11646).
223291 is an apocalyptic number.
23291 is a deficient number, since it is larger than the sum of its proper divisors (1).
23291 is an equidigital number, since it uses as much as digits as its factorization.
23291 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 108, while the sum is 17.
The square root of 23291 is about 152.6138918972.
The cubic root of 23291 is about 28.5581045017.
It can be divided in two parts, 232 and 91, that multiplied together give a palindrome (21112).
The spelling of 23291 in words is "twenty-three thousand, two hundred ninety-one".