3939394343131 has 24 divisors (see below), whose sum is σ = 4274243013600. Its totient is φ = 3629115150336.

The previous prime is 3939394343123. The next prime is 3939394343149. The reversal of 3939394343131 is 1313434939393.

It is a happy number.

It is not a de Polignac number, because 3939394343131 - 2³ = 3939394343123 is a prime.

It is a super-2 number, since 2×3939394343131² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3939394343111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 539861275 + ... + 539868571.

It is an arithmetic number, because the mean of its divisors is an integer number (178093458900).

Almost surely, 2^{3939394343131} is an apocalyptic number.

3939394343131 is a deficient number, since it is larger than the sum of its proper divisors (334848670469).

3939394343131 is a wasteful number, since it uses less digits than its factorization.

3939394343131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13255 (or 13242 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 55.

The spelling of 3939394343131 in words is "three trillion, nine hundred thirty-nine billion, three hundred ninety-four million, three hundred forty-three thousand, one hundred thirty-one".