39138610717 has 2 divisors, whose sum is σ = 39138610718. Its totient is φ = 39138610716.

The previous prime is 39138610703. The next prime is 39138610759. The reversal of 39138610717 is 71701683193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38124124516 + 1014486201 = 195254^2 + 31851^2 .

It is a cyclic number.

It is not a de Polignac number, because 39138610717 - 2³⁵ = 4778872349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39138610117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569305358 + 19569305359.

It is an arithmetic number, because the mean of its divisors is an integer number (19569305359).

Almost surely, 2^39138610717 is an apocalyptic number.

It is an amenable number.

39138610717 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138610717 is an equidigital number, since it uses as much as digits as its factorization.

39138610717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 39138610717 in words is "thirty-nine billion, one hundred thirty-eight million, six hundred ten thousand, seven hundred seventeen".