239646013 has 2 divisors, whose sum is σ = 239646014. Its totient is φ = 239646012.

The previous prime is 239645971. The next prime is 239646037. The reversal of 239646013 is 310646932.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227798649 + 11847364 = 15093^2 + 3442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239646013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 239646013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239646313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119823006 + 119823007.

It is an arithmetic number, because the mean of its divisors is an integer number (119823007).

Almost surely, 2^239646013 is an apocalyptic number.

It is an amenable number.

239646013 is a deficient number, since it is larger than the sum of its proper divisors (1).

239646013 is an equidigital number, since it uses as much as digits as its factorization.

239646013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 239646013 is about 15480.5042876516. The cubic root of 239646013 is about 621.1408175433.

The spelling of 239646013 in words is "two hundred thirty-nine million, six hundred forty-six thousand, thirteen".