23423209 has 2 divisors, whose sum is σ = 23423210. Its totient is φ = 23423208.

The previous prime is 23423203. The next prime is 23423221. The reversal of 23423209 is 90232432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18705625 + 4717584 = 4325^2 + 2172^2 .

It is a cyclic number.

It is not a de Polignac number, because 23423209 - 2¹³ = 23415017 is a prime.

It is not a weakly prime, because it can be changed into another prime (23423203) 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, 11711604 + 11711605.

It is an arithmetic number, because the mean of its divisors is an integer number (11711605).

Almost surely, 2^23423209 is an apocalyptic number.

It is an amenable number.

23423209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23423209 is an equidigital number, since it uses as much as digits as its factorization.

23423209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 23423209 is about 4839.7529895647. The cubic root of 23423209 is about 286.1203830833.

It can be divided in two parts, 23423 and 209, that added together give a palindrome (23632).

The spelling of 23423209 in words is "twenty-three million, four hundred twenty-three thousand, two hundred nine".