23863921 has 4 divisors (see below), whose sum is σ = 24371712. Its totient is φ = 23356132.

The previous prime is 23863909. The next prime is 23863933. The reversal of 23863921 is 12936832.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (23863909) and next prime (23863933).

It is a cyclic number.

It is not a de Polignac number, because 23863921 - 2¹³ = 23855729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23863951) 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 in 3 ways as a sum of consecutive naturals, for example, 253825 + ... + 253918.

It is an arithmetic number, because the mean of its divisors is an integer number (6092928).

Almost surely, 2^23863921 is an apocalyptic number.

It is an amenable number.

23863921 is a deficient number, since it is larger than the sum of its proper divisors (507791).

23863921 is an equidigital number, since it uses as much as digits as its factorization.

23863921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507790.

The product of its digits is 15552, while the sum is 34.

The square root of 23863921 is about 4885.0712379657. The cubic root of 23863921 is about 287.9037141154.

The spelling of 23863921 in words is "twenty-three million, eight hundred sixty-three thousand, nine hundred twenty-one".