39695938193 has 2 divisors, whose sum is σ = 39695938194. Its totient is φ = 39695938192.

The previous prime is 39695938187. The next prime is 39695938229. The reversal of 39695938193 is 39183959693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38514847504 + 1181090689 = 196252^2 + 34367^2 .

It is an emirp because it is prime and its reverse (39183959693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39695938193 - 2¹² = 39695934097 is a prime.

It is a super-2 number, since 2×39695938193² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39695938103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19847969096 + 19847969097.

It is an arithmetic number, because the mean of its divisors is an integer number (19847969097).

Almost surely, 2^39695938193 is an apocalyptic number.

It is an amenable number.

39695938193 is a deficient number, since it is larger than the sum of its proper divisors (1).

39695938193 is an equidigital number, since it uses as much as digits as its factorization.

39695938193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42515280, while the sum is 65.

The spelling of 39695938193 in words is "thirty-nine billion, six hundred ninety-five million, nine hundred thirty-eight thousand, one hundred ninety-three".