209052209 has 2 divisors, whose sum is σ = 209052210. Its totient is φ = 209052208.

The previous prime is 209052203. The next prime is 209052211. The reversal of 209052209 is 902250902.

209052209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208715809 + 336400 = 14447^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 209052209 - 2²⁴ = 192274993 is a prime.

Together with 209052211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (209052203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104526104 + 104526105.

It is an arithmetic number, because the mean of its divisors is an integer number (104526105).

Almost surely, 2^209052209 is an apocalyptic number.

It is an amenable number.

209052209 is a deficient number, since it is larger than the sum of its proper divisors (1).

209052209 is an equidigital number, since it uses as much as digits as its factorization.

209052209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 209052209 is about 14458.6378680704. The cubic root of 209052209 is about 593.4966250544.

The spelling of 209052209 in words is "two hundred nine million, fifty-two thousand, two hundred nine".