9938394394 has 4 divisors (see below), whose sum is σ = 14907591594. Its totient is φ = 4969197196.

The previous prime is 9938394379. The next prime is 9938394407. The reversal of 9938394394 is 4934938399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4934938399 = 67 ⋅73655797.

It can be written as a sum of positive squares in only one way, i.e., 8609427369 + 1328967025 = 92787^2 + 36455^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2484598597 + ... + 2484598600.

Almost surely, 2^9938394394 is an apocalyptic number.

9938394394 is a deficient number, since it is larger than the sum of its proper divisors (4969197200).

9938394394 is a wasteful number, since it uses less digits than its factorization.

9938394394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969197199.

The product of its digits is 22674816, while the sum is 61.

The square root of 9938394394 is about 99691.4960967083. The cubic root of 9938394394 is about 2150.0013985208.

The spelling of 9938394394 in words is "nine billion, nine hundred thirty-eight million, three hundred ninety-four thousand, three hundred ninety-four".