23669609 has 2 divisors, whose sum is σ = 23669610. Its totient is φ = 23669608.

The previous prime is 23669543. The next prime is 23669617. The reversal of 23669609 is 90696632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18705625 + 4963984 = 4325^2 + 2228^2 .

It is a cyclic number.

It is not a de Polignac number, because 23669609 - 2¹⁶ = 23604073 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 (23669629) 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 as a sum of consecutive naturals, namely, 11834804 + 11834805.

It is an arithmetic number, because the mean of its divisors is an integer number (11834805).

Almost surely, 2^23669609 is an apocalyptic number.

It is an amenable number.

23669609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23669609 is an equidigital number, since it uses as much as digits as its factorization.

23669609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 23669609 is about 4865.1422384140. The cubic root of 23669609 is about 287.1201648103.

The spelling of 23669609 in words is "twenty-three million, six hundred sixty-nine thousand, six hundred nine".