23859813 has 4 divisors (see below), whose sum is σ = 31813088. Its totient is φ = 15906540.

The previous prime is 23859811. The next prime is 23859821. The reversal of 23859813 is 31895832.

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 not a de Polignac number, because 23859813 - 2¹ = 23859811 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 (23859811) 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, 3976633 + ... + 3976638.

It is an arithmetic number, because the mean of its divisors is an integer number (7953272).

Almost surely, 2^23859813 is an apocalyptic number.

It is an amenable number.

23859813 is a deficient number, since it is larger than the sum of its proper divisors (7953275).

23859813 is an equidigital number, since it uses as much as digits as its factorization.

23859813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7953274.

The product of its digits is 51840, while the sum is 39.

The square root of 23859813 is about 4884.6507551718. The cubic root of 23859813 is about 287.8871929923.

The spelling of 23859813 in words is "twenty-three million, eight hundred fifty-nine thousand, eight hundred thirteen".