9919393793 has 12 divisors (see below), whose sum is σ = 10539447828. Its totient is φ = 9332542560.

The previous prime is 9919393787. The next prime is 9919393819. The reversal of 9919393793 is 3973939199.

It can be written as a sum of positive squares in 2 ways, for example, as 2906503744 + 7012890049 = 53912^2 + 83743^2 .

It is not a de Polignac number, because 9919393793 - 2²⁶ = 9852284929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9919393723) 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, 121430 + ... + 185967.

It is an arithmetic number, because the mean of its divisors is an integer number (878287319).

Almost surely, 2^9919393793 is an apocalyptic number.

It is an amenable number.

9919393793 is a deficient number, since it is larger than the sum of its proper divisors (620054035).

9919393793 is a wasteful number, since it uses less digits than its factorization.

9919393793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307504 (or 307481 counting only the distinct ones).

The product of its digits is 11160261, while the sum is 62.

The square root of 9919393793 is about 99596.1535050426. The cubic root of 9919393793 is about 2148.6303728973.

The spelling of 9919393793 in words is "nine billion, nine hundred nineteen million, three hundred ninety-three thousand, seven hundred ninety-three".