9991393 has 8 divisors (see below), whose sum is σ = 10920960. Its totient is φ = 9099840.

The previous prime is 9991379. The next prime is 9991409. The reversal of 9991393 is 3931999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9991393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8953 + ... + 10006.

It is an arithmetic number, because the mean of its divisors is an integer number (1365120).

Almost surely, 2^9991393 is an apocalyptic number.

It is an amenable number.

9991393 is a deficient number, since it is larger than the sum of its proper divisors (929567).

9991393 is a wasteful number, since it uses less digits than its factorization.

9991393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19007.

The product of its digits is 59049, while the sum is 43.

The square root of 9991393 is about 3160.9164810226. The cubic root of 9991393 is about 215.3816405299.

The spelling of 9991393 in words is "nine million, nine hundred ninety-one thousand, three hundred ninety-three".