23664449 has 2 divisors, whose sum is σ = 23664450. Its totient is φ = 23664448.

The previous prime is 23664427. The next prime is 23664451. The reversal of 23664449 is 94446632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 7463824 = 4025^2 + 2732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23664449 is a prime.

It is a super-2 number, since 2×23664449² = 1120012292947202, which contains 22 as substring.

Together with 23664451, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23664419) 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, 11832224 + 11832225.

It is an arithmetic number, because the mean of its divisors is an integer number (11832225).

Almost surely, 2^23664449 is an apocalyptic number.

It is an amenable number.

23664449 is a deficient number, since it is larger than the sum of its proper divisors (1).

23664449 is an equidigital number, since it uses as much as digits as its factorization.

23664449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 38.

The square root of 23664449 is about 4864.6119064114. The cubic root of 23664449 is about 287.0992991266.

The spelling of 23664449 in words is "twenty-three million, six hundred sixty-four thousand, four hundred forty-nine".