39938121 has 12 divisors (see below), whose sum is σ = 57757440. Its totient is φ = 26593560.

The previous prime is 39938113. The next prime is 39938123. The reversal of 39938121 is 12183993.

It is not a de Polignac number, because 39938121 - 2³ = 39938113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39938123) 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, 7216 + ... + 11486.

It is an arithmetic number, because the mean of its divisors is an integer number (4813120).

Almost surely, 2^39938121 is an apocalyptic number.

It is an amenable number.

39938121 is a deficient number, since it is larger than the sum of its proper divisors (17819319).

39938121 is a wasteful number, since it uses less digits than its factorization.

39938121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316 (or 5313 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 39938121 is about 6319.6614624519. The cubic root of 39938121 is about 341.8187456500.

The spelling of 39938121 in words is "thirty-nine million, nine hundred thirty-eight thousand, one hundred twenty-one".