23439811 has 2 divisors, whose sum is σ = 23439812. Its totient is φ = 23439810.

The previous prime is 23439809. The next prime is 23439817. The reversal of 23439811 is 11893432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23439811 - 2¹ = 23439809 is a prime.

Together with 23439809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23439817) 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 as a sum of consecutive naturals, namely, 11719905 + 11719906.

It is an arithmetic number, because the mean of its divisors is an integer number (11719906).

Almost surely, 2^23439811 is an apocalyptic number.

23439811 is a deficient number, since it is larger than the sum of its proper divisors (1).

23439811 is an equidigital number, since it uses as much as digits as its factorization.

23439811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 23439811 is about 4841.4678559296. The cubic root of 23439811 is about 286.1879663189.

The spelling of 23439811 in words is "twenty-three million, four hundred thirty-nine thousand, eight hundred eleven".