112639811 has 4 divisors (see below), whose sum is σ = 112771800. Its totient is φ = 112507824.

The previous prime is 112639721. The next prime is 112639817. The reversal of 112639811 is 118936211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118936211 = 9967 ⋅11933.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112639811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112639817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64706 + ... + 66423.

It is an arithmetic number, because the mean of its divisors is an integer number (28192950).

Almost surely, 2^112639811 is an apocalyptic number.

112639811 is a deficient number, since it is larger than the sum of its proper divisors (131989).

112639811 is an equidigital number, since it uses as much as digits as its factorization.

112639811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131988.

The product of its digits is 2592, while the sum is 32.

The square root of 112639811 is about 10613.1904251266. The cubic root of 112639811 is about 482.9445888307.

The spelling of 112639811 in words is "one hundred twelve million, six hundred thirty-nine thousand, eight hundred eleven".