112991443 has 4 divisors (see below), whose sum is σ = 113038288. Its totient is φ = 112944600.

The previous prime is 112991419. The next prime is 112991467. The reversal of 112991443 is 344199211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344199211 = 137 ⋅2512403.

It is an interprime number because it is at equal distance from previous prime (112991419) and next prime (112991467).

It is a cyclic number.

It is not a de Polignac number, because 112991443 - 2²⁵ = 79437011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112991399 and 112991408.

It is not an unprimeable number, because it can be changed into a prime (112901443) 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, 19596 + ... + 24697.

It is an arithmetic number, because the mean of its divisors is an integer number (28259572).

Almost surely, 2^112991443 is an apocalyptic number.

112991443 is a deficient number, since it is larger than the sum of its proper divisors (46845).

112991443 is an equidigital number, since it uses as much as digits as its factorization.

112991443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46844.

The product of its digits is 7776, while the sum is 34.

The square root of 112991443 is about 10629.7433176912. The cubic root of 112991443 is about 483.4466089900.

The spelling of 112991443 in words is "one hundred twelve million, nine hundred ninety-one thousand, four hundred forty-three".