9319391939 has 18 divisors (see below), whose sum is σ = 11013732756. Its totient is φ = 7816975920.

The previous prime is 9319391927. The next prime is 9319391987. The reversal of 9319391939 is 9391939139.

9319391939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9319391939 - 2²⁴ = 9302614723 is a prime.

It is a super-2 number, since 2×9319391939² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9319391989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4161182 + ... + 4163420.

It is an arithmetic number, because the mean of its divisors is an integer number (611874042).

Almost surely, 2^9319391939 is an apocalyptic number.

9319391939 is a deficient number, since it is larger than the sum of its proper divisors (1694340817).

9319391939 is an equidigital number, since it uses as much as digits as its factorization.

9319391939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4515 (or 2263 counting only the distinct ones).

The product of its digits is 1594323, while the sum is 56.

The square root of 9319391939 is about 96536.9977728746. The cubic root of 9319391939 is about 2104.4043570588.

The spelling of 9319391939 in words is "nine billion, three hundred nineteen million, three hundred ninety-one thousand, nine hundred thirty-nine".