39968671 has 2 divisors, whose sum is σ = 39968672. Its totient is φ = 39968670.

The previous prime is 39968653. The next prime is 39968681. The reversal of 39968671 is 17686993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39968671 - 2⁵ = 39968639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39968681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19984335 + 19984336.

It is an arithmetic number, because the mean of its divisors is an integer number (19984336).

Almost surely, 2^39968671 is an apocalyptic number.

39968671 is a deficient number, since it is larger than the sum of its proper divisors (1).

39968671 is an equidigital number, since it uses as much as digits as its factorization.

39968671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 39968671 is about 6322.0780602584. The cubic root of 39968671 is about 341.9058796207.

The spelling of 39968671 in words is "thirty-nine million, nine hundred sixty-eight thousand, six hundred seventy-one".