23643929 has 2 divisors, whose sum is σ = 23643930. Its totient is φ = 23643928.

The previous prime is 23643913. The next prime is 23643973. The reversal of 23643929 is 92934632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12588304 + 11055625 = 3548^2 + 3325^2 .

It is a cyclic number.

It is not a de Polignac number, because 23643929 - 2⁴ = 23643913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23643892 and 23643901.

It is not a weakly prime, because it can be changed into another prime (23649929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11821964 + 11821965.

It is an arithmetic number, because the mean of its divisors is an integer number (11821965).

Almost surely, 2^23643929 is an apocalyptic number.

It is an amenable number.

23643929 is a deficient number, since it is larger than the sum of its proper divisors (1).

23643929 is an equidigital number, since it uses as much as digits as its factorization.

23643929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 38.

The square root of 23643929 is about 4862.5023393311. The cubic root of 23643929 is about 287.0162916124.

The spelling of 23643929 in words is "twenty-three million, six hundred forty-three thousand, nine hundred twenty-nine".