23639243 has 2 divisors, whose sum is σ = 23639244. Its totient is φ = 23639242.

The previous prime is 23639233. The next prime is 23639257. The reversal of 23639243 is 34293632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23639243 - 2⁸ = 23638987 is a prime.

It is a super-2 number, since 2×23639243² = 1117627619226098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23639233) 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, 11819621 + 11819622.

It is an arithmetic number, because the mean of its divisors is an integer number (11819622).

Almost surely, 2^23639243 is an apocalyptic number.

23639243 is a deficient number, since it is larger than the sum of its proper divisors (1).

23639243 is an equidigital number, since it uses as much as digits as its factorization.

23639243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 32.

The square root of 23639243 is about 4862.0204647862. The cubic root of 23639243 is about 286.9973290674.

The spelling of 23639243 in words is "twenty-three million, six hundred thirty-nine thousand, two hundred forty-three".