23616809 has 2 divisors, whose sum is σ = 23616810. Its totient is φ = 23616808.

The previous prime is 23616797. The next prime is 23616839. The reversal of 23616809 is 90861632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14784025 + 8832784 = 3845^2 + 2972^2 .

It is a cyclic number.

It is not a de Polignac number, because 23616809 - 2¹² = 23612713 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23616839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11808404 + 11808405.

It is an arithmetic number, because the mean of its divisors is an integer number (11808405).

Almost surely, 2^23616809 is an apocalyptic number.

It is an amenable number.

23616809 is a deficient number, since it is larger than the sum of its proper divisors (1).

23616809 is an equidigital number, since it uses as much as digits as its factorization.

23616809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 23616809 is about 4859.7128515994. The cubic root of 23616809 is about 286.9065120603.

The spelling of 23616809 in words is "twenty-three million, six hundred sixteen thousand, eight hundred nine".