11923399 has 4 divisors (see below), whose sum is σ = 11980120. Its totient is φ = 11866680.

The previous prime is 11923381. The next prime is 11923403. The reversal of 11923399 is 99332911.

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

It is a cyclic number.

It is not a de Polignac number, because 11923399 - 2⁵ = 11923367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11923339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28044 + ... + 28465.

It is an arithmetic number, because the mean of its divisors is an integer number (2995030).

Almost surely, 2^11923399 is an apocalyptic number.

11923399 is a deficient number, since it is larger than the sum of its proper divisors (56721).

11923399 is an equidigital number, since it uses as much as digits as its factorization.

11923399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56720.

The product of its digits is 13122, while the sum is 37.

The square root of 11923399 is about 3453.0275121985. The cubic root of 11923399 is about 228.4546624023.

The spelling of 11923399 in words is "eleven million, nine hundred twenty-three thousand, three hundred ninety-nine".