23634809 has 6 divisors (see below), whose sum is σ = 25978890. Its totient is φ = 21486080.

The previous prime is 23634781. The next prime is 23634839. The reversal of 23634809 is 90843632.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20839225 + 2795584 = 4565^2 + 1672^2 .

It is not a de Polignac number, because 23634809 - 2²⁴ = 6857593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23634839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97544 + ... + 97785.

It is an arithmetic number, because the mean of its divisors is an integer number (4329815).

Almost surely, 2^23634809 is an apocalyptic number.

It is an amenable number.

23634809 is a deficient number, since it is larger than the sum of its proper divisors (2344081).

23634809 is a wasteful number, since it uses less digits than its factorization.

23634809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195351 (or 195340 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 23634809 is about 4861.5644601301. The cubic root of 23634809 is about 286.9793839675.

The spelling of 23634809 in words is "twenty-three million, six hundred thirty-four thousand, eight hundred nine".