239680121 has 2 divisors, whose sum is σ = 239680122. Its totient is φ = 239680120.

The previous prime is 239680109. The next prime is 239680139. The reversal of 239680121 is 121086932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238548025 + 1132096 = 15445^2 + 1064^2 .

It is a cyclic number.

It is not a de Polignac number, because 239680121 - 2⁶ = 239680057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (239680141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119840060 + 119840061.

It is an arithmetic number, because the mean of its divisors is an integer number (119840061).

Almost surely, 2^239680121 is an apocalyptic number.

It is an amenable number.

239680121 is a deficient number, since it is larger than the sum of its proper divisors (1).

239680121 is an equidigital number, since it uses as much as digits as its factorization.

239680121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 239680121 is about 15481.6058921547. The cubic root of 239680121 is about 621.1702844304.

The spelling of 239680121 in words is "two hundred thirty-nine million, six hundred eighty thousand, one hundred twenty-one".