999112031 has 8 divisors (see below), whose sum is σ = 1033916400. Its totient is φ = 964331200.

The previous prime is 999112021. The next prime is 999112043. The reversal of 999112031 is 130211999.

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

It is a de Polignac number, because none of the positive numbers 2^k-999112031 is a prime.

It is a super-2 number, since 2×999112031² = 1996449700977889922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 999111982 and 999112000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999112001) 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, 165260 + ... + 171198.

It is an arithmetic number, because the mean of its divisors is an integer number (129239550).

Almost surely, 2^999112031 is an apocalyptic number.

999112031 is a deficient number, since it is larger than the sum of its proper divisors (34804369).

999112031 is a wasteful number, since it uses less digits than its factorization.

999112031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11769.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 999112031 is about 31608.7334608649. The cubic root of 999112031 is about 999.7039226802.

It can be divided in two parts, 9991 and 12031, that added together give a palindrome (22022).

The spelling of 999112031 in words is "nine hundred ninety-nine million, one hundred twelve thousand, thirty-one".