39381935623 has 2 divisors, whose sum is σ = 39381935624. Its totient is φ = 39381935622.

The previous prime is 39381935609. The next prime is 39381935687. The reversal of 39381935623 is 32653918393.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39381935623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39381933623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19690967811 + 19690967812.

It is an arithmetic number, because the mean of its divisors is an integer number (19690967812).

Almost surely, 2^39381935623 is an apocalyptic number.

39381935623 is a deficient number, since it is larger than the sum of its proper divisors (1).

39381935623 is an equidigital number, since it uses as much as digits as its factorization.

39381935623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 52.

The spelling of 39381935623 in words is "thirty-nine billion, three hundred eighty-one million, nine hundred thirty-five thousand, six hundred twenty-three".