999311112 has 24 divisors (see below), whose sum is σ = 2706467790. Its totient is φ = 333103680.

The previous prime is 999311111. The next prime is 999311113. The reversal of 999311112 is 211113999.

It is an interprime number because it is at equal distance from previous prime (999311111) and next prime (999311113).

It can be written as a sum of positive squares in only one way, i.e., 778075236 + 221235876 = 27894^2 + 14874^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (999311111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6939589 + ... + 6939732.

Almost surely, 2^999311112 is an apocalyptic number.

It is an amenable number.

999311112 is an abundant number, since it is smaller than the sum of its proper divisors (1707156678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999311112 is a wasteful number, since it uses less digits than its factorization.

999311112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13879333 (or 13879326 counting only the distinct ones).

The product of its digits is 4374, while the sum is 36.

The square root of 999311112 is about 31611.8824494841. The cubic root of 999311112 is about 999.7703179168.

The spelling of 999311112 in words is "nine hundred ninety-nine million, three hundred eleven thousand, one hundred twelve".