23723813 has 4 divisors (see below), whose sum is σ = 23777100. Its totient is φ = 23670528.

The previous prime is 23723809. The next prime is 23723863. The reversal of 23723813 is 31832732.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4870849 + 18852964 = 2207^2 + 4342^2 .

It is a cyclic number.

It is not a de Polignac number, because 23723813 - 2² = 23723809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23723863) 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, 25970 + ... + 26867.

It is an arithmetic number, because the mean of its divisors is an integer number (5944275).

Almost surely, 2^23723813 is an apocalyptic number.

It is an amenable number.

23723813 is a deficient number, since it is larger than the sum of its proper divisors (53287).

23723813 is an equidigital number, since it uses as much as digits as its factorization.

23723813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53286.

The product of its digits is 6048, while the sum is 29.

The square root of 23723813 is about 4870.7097018812. The cubic root of 23723813 is about 287.3391685205.

The spelling of 23723813 in words is "twenty-three million, seven hundred twenty-three thousand, eight hundred thirteen".