39129917 has 4 divisors (see below), whose sum is σ = 39301020. Its totient is φ = 38958816.

The previous prime is 39129889. The next prime is 39129919. The reversal of 39129917 is 71992193.

39129917 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.

It can be written as a sum of positive squares in 2 ways, for example, as 34351321 + 4778596 = 5861^2 + 2186^2 .

It is a cyclic number.

It is not a de Polignac number, because 39129917 - 2⁸ = 39129661 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 (39129919) 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, 85208 + ... + 85665.

It is an arithmetic number, because the mean of its divisors is an integer number (9825255).

Almost surely, 2^39129917 is an apocalyptic number.

It is an amenable number.

39129917 is a deficient number, since it is larger than the sum of its proper divisors (171103).

39129917 is a wasteful number, since it uses less digits than its factorization.

39129917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171102.

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

The square root of 39129917 is about 6255.3910349394. The cubic root of 39129917 is about 339.4972876382.

The spelling of 39129917 in words is "thirty-nine million, one hundred twenty-nine thousand, nine hundred seventeen".