39393139 has 2 divisors, whose sum is σ = 39393140. Its totient is φ = 39393138.

The previous prime is 39393127. The next prime is 39393149. The reversal of 39393139 is 93139393.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39393139 - 2²¹ = 37295987 is a prime.

It is not a weakly prime, because it can be changed into another prime (39393149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19696569 + 19696570.

It is an arithmetic number, because the mean of its divisors is an integer number (19696570).

Almost surely, 2^39393139 is an apocalyptic number.

39393139 is a deficient number, since it is larger than the sum of its proper divisors (1).

39393139 is an equidigital number, since it uses as much as digits as its factorization.

39393139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59049, while the sum is 40.

The square root of 39393139 is about 6276.3953827018. The cubic root of 39393139 is about 340.2568388050.

The spelling of 39393139 in words is "thirty-nine million, three hundred ninety-three thousand, one hundred thirty-nine".