23966399 has 4 divisors (see below), whose sum is σ = 23981664. Its totient is φ = 23951136.

The previous prime is 23966389. The next prime is 23966407. The reversal of 23966399 is 99366932.

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 23966399 - 2¹² = 23962303 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 (23966359) 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, 4967 + ... + 8520.

It is an arithmetic number, because the mean of its divisors is an integer number (5995416).

Almost surely, 2^23966399 is an apocalyptic number.

23966399 is a deficient number, since it is larger than the sum of its proper divisors (15265).

23966399 is a wasteful number, since it uses less digits than its factorization.

23966399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15264.

The product of its digits is 472392, while the sum is 47.

The square root of 23966399 is about 4895.5488967020. The cubic root of 23966399 is about 288.3152372247.

The spelling of 23966399 in words is "twenty-three million, nine hundred sixty-six thousand, three hundred ninety-nine".