112009999 has 4 divisors (see below), whose sum is σ = 112031560. Its totient is φ = 111988440.

The previous prime is 112009987. The next prime is 112010009. The reversal of 112009999 is 999900211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999900211 = 4751 ⋅210461.

It is a cyclic number.

It is not a de Polignac number, because 112009999 - 2¹³ = 112001807 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 (112009939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2317 + ... + 15145.

It is an arithmetic number, because the mean of its divisors is an integer number (28007890).

Almost surely, 2^112009999 is an apocalyptic number.

112009999 is a deficient number, since it is larger than the sum of its proper divisors (21561).

112009999 is an equidigital number, since it uses as much as digits as its factorization.

112009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21560.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 112009999 is about 10583.4776420608. The cubic root of 112009999 is about 482.0427970585.

The spelling of 112009999 in words is "one hundred twelve million, nine thousand, nine hundred ninety-nine".