9990111 has 8 divisors (see below), whose sum is σ = 13680304. Its totient is φ = 6480000.

The previous prime is 9990089. The next prime is 9990121. The reversal of 9990111 is 1110999.

9990111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9990111 - 2⁶ = 9990047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44890 + ... + 45111.

It is an arithmetic number, because the mean of its divisors is an integer number (1710038).

Almost surely, 2^9990111 is an apocalyptic number.

9990111 is a deficient number, since it is larger than the sum of its proper divisors (3690193).

9990111 is a wasteful number, since it uses less digits than its factorization.

9990111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90041.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 9990111 is about 3160.7136852300. The cubic root of 9990111 is about 215.3724282318.

It can be divided in two parts, 9990 and 111, that added together give a palindrome (10101).

The spelling of 9990111 in words is "nine million, nine hundred ninety thousand, one hundred eleven".