241539209 has 2 divisors, whose sum is σ = 241539210. Its totient is φ = 241539208.

The previous prime is 241539121. The next prime is 241539211. The reversal of 241539209 is 902935142.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146047225 + 95491984 = 12085^2 + 9772^2 .

It is a cyclic number.

It is not a de Polignac number, because 241539209 - 2²⁴ = 224761993 is a prime.

Together with 241539211, 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 (241539239) 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, 120769604 + 120769605.

It is an arithmetic number, because the mean of its divisors is an integer number (120769605).

Almost surely, 2^241539209 is an apocalyptic number.

It is an amenable number.

241539209 is a deficient number, since it is larger than the sum of its proper divisors (1).

241539209 is an equidigital number, since it uses as much as digits as its factorization.

241539209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 241539209 is about 15541.5317456163. The cubic root of 241539209 is about 622.7721934533.

The spelling of 241539209 in words is "two hundred forty-one million, five hundred thirty-nine thousand, two hundred nine".