23984891 has 4 divisors (see below), whose sum is σ = 27411312. Its totient is φ = 20558472.

The previous prime is 23984881. The next prime is 23984923. The reversal of 23984891 is 19848932.

It is a happy number.

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 23984891 - 2¹⁰ = 23983867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23984881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1713200 + ... + 1713213.

It is an arithmetic number, because the mean of its divisors is an integer number (6852828).

Almost surely, 2^23984891 is an apocalyptic number.

23984891 is a deficient number, since it is larger than the sum of its proper divisors (3426421).

23984891 is an equidigital number, since it uses as much as digits as its factorization.

23984891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3426420.

The product of its digits is 124416, while the sum is 44.

The square root of 23984891 is about 4897.4371869377. The cubic root of 23984891 is about 288.3893709417.

It can be divided in two parts, 2 and 3984891, that added together give a palindrome (3984893).

The spelling of 23984891 in words is "twenty-three million, nine hundred eighty-four thousand, eight hundred ninety-one".