23823209 has 2 divisors, whose sum is σ = 23823210. Its totient is φ = 23823208.

The previous prime is 23823203. The next prime is 23823259. The reversal of 23823209 is 90232832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16000000 + 7823209 = 4000^2 + 2797^2 .

It is a cyclic number.

It is not a de Polignac number, because 23823209 - 2¹² = 23819113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23823203) 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, 11911604 + 11911605.

It is an arithmetic number, because the mean of its divisors is an integer number (11911605).

Almost surely, 2^23823209 is an apocalyptic number.

It is an amenable number.

23823209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23823209 is an equidigital number, since it uses as much as digits as its factorization.

23823209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 23823209 is about 4880.9024780260. The cubic root of 23823209 is about 287.7398990718.

The spelling of 23823209 in words is "twenty-three million, eight hundred twenty-three thousand, two hundred nine".