23664143 has 2 divisors, whose sum is σ = 23664144. Its totient is φ = 23664142.

The previous prime is 23664103. The next prime is 23664149. The reversal of 23664143 is 34146632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23664143 - 2¹⁰ = 23663119 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23664149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11832071 + 11832072.

It is an arithmetic number, because the mean of its divisors is an integer number (11832072).

Almost surely, 2^23664143 is an apocalyptic number.

23664143 is a deficient number, since it is larger than the sum of its proper divisors (1).

23664143 is an equidigital number, since it uses as much as digits as its factorization.

23664143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

The square root of 23664143 is about 4864.5804546744. The cubic root of 23664143 is about 287.0980616478.

The spelling of 23664143 in words is "twenty-three million, six hundred sixty-four thousand, one hundred forty-three".