239038209 has 10 divisors (see below), whose sum is σ = 357081890. Its totient is φ = 159358752.

The previous prime is 239038157. The next prime is 239038223. The reversal of 239038209 is 902830932.

It can be written as a sum of positive squares in only one way, i.e., 211789809 + 27248400 = 14553^2 + 5220^2 .

It is not a de Polignac number, because 239038209 - 2⁷ = 239038081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239038229) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1475464 + ... + 1475625.

It is an arithmetic number, because the mean of its divisors is an integer number (35708189).

Almost surely, 2^239038209 is an apocalyptic number.

It is an amenable number.

239038209 is a deficient number, since it is larger than the sum of its proper divisors (118043681).

239038209 is an equidigital number, since it uses as much as digits as its factorization.

239038209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951101 (or 2951092 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 239038209 is about 15460.8605517287. The cubic root of 239038209 is about 620.6152486123.

The spelling of 239038209 in words is "two hundred thirty-nine million, thirty-eight thousand, two hundred nine".