9938394393 has 16 divisors (see below), whose sum is σ = 13620203520. Its totient is φ = 6442473744.

The previous prime is 9938394379. The next prime is 9938394407. The reversal of 9938394393 is 3934938399.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9938394379) and next prime (9938394407).

It is not a de Polignac number, because 9938394393 - 2⁶ = 9938394329 is a prime.

It is a super-2 number, since 2×9938394393² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9938393393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143973 + ... + 201506.

It is an arithmetic number, because the mean of its divisors is an integer number (851262720).

Almost surely, 2^9938394393 is an apocalyptic number.

It is an amenable number.

9938394393 is a deficient number, since it is larger than the sum of its proper divisors (3681809127).

9938394393 is a wasteful number, since it uses less digits than its factorization.

9938394393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345748.

The product of its digits is 17006112, while the sum is 60.

The square root of 9938394393 is about 99691.4960916928. The cubic root of 9938394393 is about 2150.0013984487.

The spelling of 9938394393 in words is "nine billion, nine hundred thirty-eight million, three hundred ninety-four thousand, three hundred ninety-three".