23644609 has 2 divisors, whose sum is σ = 23644610. Its totient is φ = 23644608.

The previous prime is 23644601. The next prime is 23644639. The reversal of 23644609 is 90644632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 1882384 = 4665^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 23644609 - 2³ = 23644601 is a prime.

It is not a weakly prime, because it can be changed into another prime (23644601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11822304 + 11822305.

It is an arithmetic number, because the mean of its divisors is an integer number (11822305).

Almost surely, 2^23644609 is an apocalyptic number.

It is an amenable number.

23644609 is a deficient number, since it is larger than the sum of its proper divisors (1).

23644609 is an equidigital number, since it uses as much as digits as its factorization.

23644609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 23644609 is about 4862.5722616739. The cubic root of 23644609 is about 287.0190431180.

The spelling of 23644609 in words is "twenty-three million, six hundred forty-four thousand, six hundred nine".