234210209 has 2 divisors, whose sum is σ = 234210210. Its totient is φ = 234210208.

The previous prime is 234210191. The next prime is 234210217. The reversal of 234210209 is 902012432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145323025 + 88887184 = 12055^2 + 9428^2 .

It is a cyclic number.

It is not a de Polignac number, because 234210209 - 2⁸ = 234209953 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (234210289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117105104 + 117105105.

It is an arithmetic number, because the mean of its divisors is an integer number (117105105).

Almost surely, 2^234210209 is an apocalyptic number.

It is an amenable number.

234210209 is a deficient number, since it is larger than the sum of its proper divisors (1).

234210209 is an equidigital number, since it uses as much as digits as its factorization.

234210209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 234210209 is about 15303.9278944982. The cubic root of 234210209 is about 616.4084835280.

The spelling of 234210209 in words is "two hundred thirty-four million, two hundred ten thousand, two hundred nine".