112128789 has 4 divisors (see below), whose sum is σ = 149505056. Its totient is φ = 74752524.

The previous prime is 112128781. The next prime is 112128811. The reversal of 112128789 is 987821211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 112128789 - 2³ = 112128781 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 (112128781) 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, 18688129 + ... + 18688134.

It is an arithmetic number, because the mean of its divisors is an integer number (37376264).

Almost surely, 2^112128789 is an apocalyptic number.

It is an amenable number.

112128789 is a deficient number, since it is larger than the sum of its proper divisors (37376267).

112128789 is an equidigital number, since it uses as much as digits as its factorization.

112128789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37376266.

The product of its digits is 16128, while the sum is 39.

The square root of 112128789 is about 10589.0882043734. The cubic root of 112128789 is about 482.2131438538.

The spelling of 112128789 in words is "one hundred twelve million, one hundred twenty-eight thousand, seven hundred eighty-nine".