39992688713 has 2 divisors, whose sum is σ = 39992688714. Its totient is φ = 39992688712.

The previous prime is 39992688689. The next prime is 39992688739. The reversal of 39992688713 is 31788629993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30529873984 + 9462814729 = 174728^2 + 97277^2 .

It is a cyclic number.

It is not a de Polignac number, because 39992688713 - 2⁸ = 39992688457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39992688713.

It is not a weakly prime, because it can be changed into another prime (39992688773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19996344356 + 19996344357.

It is an arithmetic number, because the mean of its divisors is an integer number (19996344357).

Almost surely, 2^39992688713 is an apocalyptic number.

It is an amenable number.

39992688713 is a deficient number, since it is larger than the sum of its proper divisors (1).

39992688713 is an equidigital number, since it uses as much as digits as its factorization.

39992688713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 65.

The spelling of 39992688713 in words is "thirty-nine billion, nine hundred ninety-two million, six hundred eighty-eight thousand, seven hundred thirteen".