9117715394 has 4 divisors (see below), whose sum is σ = 13676573094. Its totient is φ = 4558857696.

The previous prime is 9117715393. The next prime is 9117715433. The reversal of 9117715394 is 4935177119.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4935177119 = 15959 ⋅309241.

It can be written as a sum of positive squares in only one way, i.e., 7474467025 + 1643248369 = 86455^2 + 40537^2 .

It is not an unprimeable number, because it can be changed into a prime (9117715393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2279428847 + ... + 2279428850.

Almost surely, 2^9117715394 is an apocalyptic number.

9117715394 is a deficient number, since it is larger than the sum of its proper divisors (4558857700).

9117715394 is a wasteful number, since it uses less digits than its factorization.

9117715394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4558857699.

The product of its digits is 238140, while the sum is 47.

The square root of 9117715394 is about 95486.7288894116. The cubic root of 9117715394 is about 2089.1133800265.

The spelling of 9117715394 in words is "nine billion, one hundred seventeen million, seven hundred fifteen thousand, three hundred ninety-four".