11943823 has 2 divisors, whose sum is σ = 11943824. Its totient is φ = 11943822.

The previous prime is 11943821. The next prime is 11943829. The reversal of 11943823 is 32834911.

It is a weak prime.

It is an emirp because it is prime and its reverse (32834911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11943823 - 2¹ = 11943821 is a prime.

Together with 11943821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11943821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5971911 + 5971912.

It is an arithmetic number, because the mean of its divisors is an integer number (5971912).

Almost surely, 2^11943823 is an apocalyptic number.

11943823 is a deficient number, since it is larger than the sum of its proper divisors (1).

11943823 is an equidigital number, since it uses as much as digits as its factorization.

11943823 is an evil number, because the sum of its binary digits is even.

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

The square root of 11943823 is about 3455.9836515817. The cubic root of 11943823 is about 228.5850306080.

The spelling of 11943823 in words is "eleven million, nine hundred forty-three thousand, eight hundred twenty-three".