39381939 has 6 divisors (see below), whose sum is σ = 56885036. Its totient is φ = 26254620.

The previous prime is 39381931. The next prime is 39381959. The reversal of 39381939 is 93918393.

It is not a de Polignac number, because 39381939 - 2³ = 39381931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39381894 and 39381903.

It is not an unprimeable number, because it can be changed into a prime (39381931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2187877 + ... + 2187894.

Almost surely, 2^39381939 is an apocalyptic number.

39381939 is a deficient number, since it is larger than the sum of its proper divisors (17503097).

39381939 is a wasteful number, since it uses less digits than its factorization.

39381939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4375777 (or 4375774 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 39381939 is about 6275.5030874026. The cubic root of 39381939 is about 340.2245892144.

The spelling of 39381939 in words is "thirty-nine million, three hundred eighty-one thousand, nine hundred thirty-nine".