23534209 has 2 divisors, whose sum is σ = 23534210. Its totient is φ = 23534208.

The previous prime is 23534207. The next prime is 23534213. The reversal of 23534209 is 90243532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23040000 + 494209 = 4800^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 23534209 - 2¹ = 23534207 is a prime.

Together with 23534207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23534207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11767104 + 11767105.

It is an arithmetic number, because the mean of its divisors is an integer number (11767105).

Almost surely, 2^23534209 is an apocalyptic number.

It is an amenable number.

23534209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23534209 is an equidigital number, since it uses as much as digits as its factorization.

23534209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 23534209 is about 4851.2069632206. The cubic root of 23534209 is about 286.5716353170.

The spelling of 23534209 in words is "twenty-three million, five hundred thirty-four thousand, two hundred nine".