9138394 has 4 divisors (see below), whose sum is σ = 13707594. Its totient is φ = 4569196.

The previous prime is 9138347. The next prime is 9138413. The reversal of 9138394 is 4938319.

9138394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8922169 + 216225 = 2987^2 + 465^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2284597 + ... + 2284600.

Almost surely, 2^9138394 is an apocalyptic number.

9138394 is a deficient number, since it is larger than the sum of its proper divisors (4569200).

9138394 is a wasteful number, since it uses less digits than its factorization.

9138394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569199.

The product of its digits is 23328, while the sum is 37.

The square root of 9138394 is about 3022.9776711051. The cubic root of 9138394 is about 209.0691528832.

The spelling of 9138394 in words is "nine million, one hundred thirty-eight thousand, three hundred ninety-four".