9991347394 has 16 divisors (see below), whose sum is σ = 17142555456. Its totient is φ = 4278373200.

The previous prime is 9991347367. The next prime is 9991347433. The reversal of 9991347394 is 4937431999.

9991347394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285612 + ... + 318679.

It is an arithmetic number, because the mean of its divisors is an integer number (1071409716).

Almost surely, 2^9991347394 is an apocalyptic number.

9991347394 is a deficient number, since it is larger than the sum of its proper divisors (7151208062).

9991347394 is a wasteful number, since it uses less digits than its factorization.

9991347394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605481.

The product of its digits is 6613488, while the sum is 58.

The square root of 9991347394 is about 99956.7276075002. The cubic root of 9991347394 is about 2153.8131282422.

The spelling of 9991347394 in words is "nine billion, nine hundred ninety-one million, three hundred forty-seven thousand, three hundred ninety-four".