23655689 has 2 divisors, whose sum is σ = 23655690. Its totient is φ = 23655688.

The previous prime is 23655683. The next prime is 23655713. The reversal of 23655689 is 98655632.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22401289 + 1254400 = 4733^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 23655689 - 2⁴ = 23655673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23655683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11827844 + 11827845.

It is an arithmetic number, because the mean of its divisors is an integer number (11827845).

Almost surely, 2^23655689 is an apocalyptic number.

It is an amenable number.

23655689 is a deficient number, since it is larger than the sum of its proper divisors (1).

23655689 is an equidigital number, since it uses as much as digits as its factorization.

23655689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 23655689 is about 4863.7114429209. The cubic root of 23655689 is about 287.0638690426.

The spelling of 23655689 in words is "twenty-three million, six hundred fifty-five thousand, six hundred eighty-nine".