999791122 has 16 divisors (see below), whose sum is σ = 1652223744. Its totient is φ = 449950000.

The previous prime is 999791113. The next prime is 999791123. The reversal of 999791122 is 221197999.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (999791123) 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, 222754 + ... + 227197.

It is an arithmetic number, because the mean of its divisors is an integer number (103263984).

Almost surely, 2^999791122 is an apocalyptic number.

999791122 is a deficient number, since it is larger than the sum of its proper divisors (652432622).

999791122 is a wasteful number, since it uses less digits than its factorization.

999791122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450065.

The product of its digits is 183708, while the sum is 49.

The square root of 999791122 is about 31619.4737780375. The cubic root of 999791122 is about 999.9303691517.

It can be divided in two parts, 99979 and 1122, that added together give a palindrome (101101).

The spelling of 999791122 in words is "nine hundred ninety-nine million, seven hundred ninety-one thousand, one hundred twenty-two".