39906631 has 8 divisors (see below), whose sum is σ = 42065280. Its totient is φ = 37753848.

The previous prime is 39906617. The next prime is 39906637. The reversal of 39906631 is 13660993.

39906631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39906631 - 2¹⁵ = 39873863 is a prime.

It is a super-2 number, since 2×39906631² = 3185078395540322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39906637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24030 + ... + 25636.

It is an arithmetic number, because the mean of its divisors is an integer number (5258160).

Almost surely, 2^39906631 is an apocalyptic number.

39906631 is a deficient number, since it is larger than the sum of its proper divisors (2158649).

39906631 is a wasteful number, since it uses less digits than its factorization.

39906631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 39906631 is about 6317.1695402292. The cubic root of 39906631 is about 341.7288841154.

The spelling of 39906631 in words is "thirty-nine million, nine hundred six thousand, six hundred thirty-one".