39996867671 has 2 divisors, whose sum is σ = 39996867672. Its totient is φ = 39996867670.

The previous prime is 39996867641. The next prime is 39996867689. The reversal of 39996867671 is 17676869993.

It is a strong prime.

It is an emirp because it is prime and its reverse (17676869993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39996867671 - 2¹⁴ = 39996851287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39996867595 and 39996867604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39996867641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19998433835 + 19998433836.

It is an arithmetic number, because the mean of its divisors is an integer number (19998433836).

Almost surely, 2^39996867671 is an apocalyptic number.

39996867671 is a deficient number, since it is larger than the sum of its proper divisors (1).

39996867671 is an equidigital number, since it uses as much as digits as its factorization.

39996867671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 185177664, while the sum is 71.

The spelling of 39996867671 in words is "thirty-nine billion, nine hundred ninety-six million, eight hundred sixty-seven thousand, six hundred seventy-one".