241709209 has 9 divisors (see below), whose sum is σ = 281298591. Its totient is φ = 207086040.

The previous prime is 241709189. The next prime is 241709219. The reversal of 241709209 is 902907142.

It is a happy number.

The square root of 241709209 is 15547.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 163916809 + 77792400 = 12803^2 + 8820^2 .

It is not a de Polignac number, because 241709209 - 2⁹ = 241708697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (241709219) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 107719 + ... + 109939.

It is an arithmetic number, because the mean of its divisors is an integer number (31255399).

Almost surely, 2^241709209 is an apocalyptic number.

241709209 is the 15547-th square number.

241709209 is the 7774-th centered octagonal number.

It is an amenable number.

241709209 is a deficient number, since it is larger than the sum of its proper divisors (39589382).

241709209 is an frugal number, since it uses more digits than its factorization.

241709209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The cubic root of 241709209 is about 622.9182655892.

The spelling of 241709209 in words is "two hundred forty-one million, seven hundred nine thousand, two hundred nine".