39668671 has 4 divisors (see below), whose sum is σ = 45335632. Its totient is φ = 34001712.

The previous prime is 39668669. The next prime is 39668677. The reversal of 39668671 is 17686693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39668671 - 2¹ = 39668669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39668677) 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 in 3 ways as a sum of consecutive naturals, for example, 2833470 + ... + 2833483.

It is an arithmetic number, because the mean of its divisors is an integer number (11333908).

Almost surely, 2^39668671 is an apocalyptic number.

39668671 is a deficient number, since it is larger than the sum of its proper divisors (5666961).

39668671 is an equidigital number, since it uses as much as digits as its factorization.

39668671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5666960.

The product of its digits is 326592, while the sum is 46.

The square root of 39668671 is about 6298.3069947407. The cubic root of 39668671 is about 341.0482956911.

The spelling of 39668671 in words is "thirty-nine million, six hundred sixty-eight thousand, six hundred seventy-one".