938439928511 has 2 divisors, whose sum is σ = 938439928512. Its totient is φ = 938439928510.

The previous prime is 938439928417. The next prime is 938439928513. The reversal of 938439928511 is 115829934839.

It is a strong prime.

It is an emirp because it is prime and its reverse (115829934839) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 938439928511 - 2¹⁰ = 938439927487 is a prime.

Together with 938439928513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (938439928513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469219964255 + 469219964256.

It is an arithmetic number, because the mean of its divisors is an integer number (469219964256).

Almost surely, 2^938439928511 is an apocalyptic number.

938439928511 is a deficient number, since it is larger than the sum of its proper divisors (1).

938439928511 is an equidigital number, since it uses as much as digits as its factorization.

938439928511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 62.

The spelling of 938439928511 in words is "nine hundred thirty-eight billion, four hundred thirty-nine million, nine hundred twenty-eight thousand, five hundred eleven".