9991022 has 8 divisors (see below), whose sum is σ = 15503400. Its totient is φ = 4823224.

The previous prime is 9990997. The next prime is 9991027. The reversal of 9991022 is 2201999.

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

It is a self number, because there is not a number n which added to its sum of digits gives 9991022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86072 + ... + 86187.

It is an arithmetic number, because the mean of its divisors is an integer number (1937925).

Almost surely, 2^9991022 is an apocalyptic number.

9991022 is a deficient number, since it is larger than the sum of its proper divisors (5512378).

9991022 is a wasteful number, since it uses less digits than its factorization.

9991022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172290.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 9991022 is about 3160.8577949664. The cubic root of 9991022 is about 215.3789746495.

It can be divided in two parts, 9 and 991022, that multiplied together give a palindrome (8919198).

The spelling of 9991022 in words is "nine million, nine hundred ninety-one thousand, twenty-two".