39942117 has 12 divisors (see below), whose sum is σ = 58556160. Its totient is φ = 26230248.

The previous prime is 39942113. The next prime is 39942127. The reversal of 39942117 is 71124993.

It is not a de Polignac number, because 39942117 - 2² = 39942113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39942113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32517 + ... + 33722.

It is an arithmetic number, because the mean of its divisors is an integer number (4879680).

Almost surely, 2^39942117 is an apocalyptic number.

It is an amenable number.

39942117 is a deficient number, since it is larger than the sum of its proper divisors (18614043).

39942117 is a wasteful number, since it uses less digits than its factorization.

39942117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66312 (or 66309 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 39942117 is about 6319.9776107198. The cubic root of 39942117 is about 341.8301454699.

The spelling of 39942117 in words is "thirty-nine million, nine hundred forty-two thousand, one hundred seventeen".