23805109 has 4 divisors (see below), whose sum is σ = 24254316. Its totient is φ = 23355904.

The previous prime is 23805107. The next prime is 23805113. The reversal of 23805109 is 90150832.

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 15824484 + 7980625 = 3978^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 23805109 - 2¹ = 23805107 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 (23805107) 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, 224524 + ... + 224629.

It is an arithmetic number, because the mean of its divisors is an integer number (6063579).

Almost surely, 2^23805109 is an apocalyptic number.

It is an amenable number.

23805109 is a deficient number, since it is larger than the sum of its proper divisors (449207).

23805109 is an equidigital number, since it uses as much as digits as its factorization.

23805109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449206.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 23805109 is about 4879.0479604119. The cubic root of 23805109 is about 287.6670092035.

The spelling of 23805109 in words is "twenty-three million, eight hundred five thousand, one hundred nine".