239443423279913 has 2 divisors, whose sum is σ = 239443423279914. Its totient is φ = 239443423279912.

The previous prime is 239443423279807. The next prime is 239443423279927. The reversal of 239443423279913 is 319972324344932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228938324581264 + 10505098698649 = 15130708^2 + 3241157^2 .

It is a cyclic number.

It is not a de Polignac number, because 239443423279913 - 2¹⁸ = 239443423017769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 239443423279913.

It is not a weakly prime, because it can be changed into another prime (239443423279933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119721711639956 + 119721711639957.

It is an arithmetic number, because the mean of its divisors is an integer number (119721711639957).

Almost surely, 2^{239443423279913} is an apocalyptic number.

It is an amenable number.

239443423279913 is a deficient number, since it is larger than the sum of its proper divisors (1).

239443423279913 is an equidigital number, since it uses as much as digits as its factorization.

239443423279913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211631616, while the sum is 65.

The spelling of 239443423279913 in words is "two hundred thirty-nine trillion, four hundred forty-three billion, four hundred twenty-three million, two hundred seventy-nine thousand, nine hundred thirteen".