239823929 has 2 divisors, whose sum is σ = 239823930. Its totient is φ = 239823928.

The previous prime is 239823901. The next prime is 239823931. The reversal of 239823929 is 929328932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220225600 + 19598329 = 14840^2 + 4427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239823929 is a prime.

It is a Sophie Germain prime.

Together with 239823931, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (239823949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119911964 + 119911965.

It is an arithmetic number, because the mean of its divisors is an integer number (119911965).

Almost surely, 2^239823929 is an apocalyptic number.

It is an amenable number.

239823929 is a deficient number, since it is larger than the sum of its proper divisors (1).

239823929 is an equidigital number, since it uses as much as digits as its factorization.

239823929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 239823929 is about 15486.2496751150. The cubic root of 239823929 is about 621.2944935860.

The spelling of 239823929 in words is "two hundred thirty-nine million, eight hundred twenty-three thousand, nine hundred twenty-nine".