23865913 has 4 divisors (see below), whose sum is σ = 24270480. Its totient is φ = 23461348.

The previous prime is 23865901. The next prime is 23865991. The reversal of 23865913 is 31956832.

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 a cyclic number.

It is not a de Polignac number, because 23865913 - 2¹³ = 23857721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23865313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202195 + ... + 202312.

It is an arithmetic number, because the mean of its divisors is an integer number (6067620).

Almost surely, 2^23865913 is an apocalyptic number.

It is an amenable number.

23865913 is a deficient number, since it is larger than the sum of its proper divisors (404567).

23865913 is an equidigital number, since it uses as much as digits as its factorization.

23865913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404566.

The product of its digits is 38880, while the sum is 37.

The square root of 23865913 is about 4885.2751201954. The cubic root of 23865913 is about 287.9117246493.

The spelling of 23865913 in words is "twenty-three million, eight hundred sixty-five thousand, nine hundred thirteen".