938387439623 has 2 divisors, whose sum is σ = 938387439624. Its totient is φ = 938387439622.

The previous prime is 938387439593. The next prime is 938387439643. The reversal of 938387439623 is 326934783839.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-938387439623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 938387439623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (938387439643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469193719811 + 469193719812.

It is an arithmetic number, because the mean of its divisors is an integer number (469193719812).

Almost surely, 2^938387439623 is an apocalyptic number.

938387439623 is a deficient number, since it is larger than the sum of its proper divisors (1).

938387439623 is an equidigital number, since it uses as much as digits as its factorization.

938387439623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744, while the sum is 65.

The spelling of 938387439623 in words is "nine hundred thirty-eight billion, three hundred eighty-seven million, four hundred thirty-nine thousand, six hundred twenty-three".