9991113 has 16 divisors (see below), whose sum is σ = 14598336. Its totient is φ = 6027840.

The previous prime is 9991067. The next prime is 9991123. The reversal of 9991113 is 3111999.

9991113 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9991113 - 2⁸ = 9990857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (9991123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8595 + ... + 9687.

It is an arithmetic number, because the mean of its divisors is an integer number (912396).

Almost surely, 2^9991113 is an apocalyptic number.

It is an amenable number.

9991113 is a deficient number, since it is larger than the sum of its proper divisors (4607223).

9991113 is a wasteful number, since it uses less digits than its factorization.

9991113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384.

The product of its digits is 2187, while the sum is 33.

The square root of 9991113 is about 3160.8721897603. The cubic root of 9991113 is about 215.3796285508.

It can be divided in two parts, 999 and 1113, that added together give a palindrome (2112).

The spelling of 9991113 in words is "nine million, nine hundred ninety-one thousand, one hundred thirteen".