39992117 has 4 divisors (see below), whose sum is σ = 43627776. Its totient is φ = 36356460.

The previous prime is 39992111. The next prime is 39992129. The reversal of 39992117 is 71129993.

39992117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71129993 = 11 ⋅6466363.

It is a cyclic number.

It is not a de Polignac number, because 39992117 - 2¹⁰ = 39991093 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 (39992111) 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 3 ways as a sum of consecutive naturals, for example, 1817813 + ... + 1817834.

It is an arithmetic number, because the mean of its divisors is an integer number (10906944).

Almost surely, 2^39992117 is an apocalyptic number.

It is an amenable number.

39992117 is a deficient number, since it is larger than the sum of its proper divisors (3635659).

39992117 is a wasteful number, since it uses less digits than its factorization.

39992117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635658.

The product of its digits is 30618, while the sum is 41.

The square root of 39992117 is about 6323.9320837593. The cubic root of 39992117 is about 341.9727216254.

It can be divided in two parts, 3999 and 2117, that added together give a palindrome (6116).

The spelling of 39992117 in words is "thirty-nine million, nine hundred ninety-two thousand, one hundred seventeen".