239140609 has 2 divisors, whose sum is σ = 239140610. Its totient is φ = 239140608.

The previous prime is 239140607. The next prime is 239140661. The reversal of 239140609 is 906041932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128890609 + 110250000 = 11353^2 + 10500^2 .

It is a cyclic number.

It is not a de Polignac number, because 239140609 - 2¹ = 239140607 is a prime.

Together with 239140607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (239140607) 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, 119570304 + 119570305.

It is an arithmetic number, because the mean of its divisors is an integer number (119570305).

Almost surely, 2^239140609 is an apocalyptic number.

It is an amenable number.

239140609 is a deficient number, since it is larger than the sum of its proper divisors (1).

239140609 is an equidigital number, since it uses as much as digits as its factorization.

239140609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 239140609 is about 15464.1717851297. The cubic root of 239140609 is about 620.7038563836.

The spelling of 239140609 in words is "two hundred thirty-nine million, one hundred forty thousand, six hundred nine".