2112809189 has 8 divisors (see below), whose sum is σ = 2167196160. Its totient is φ = 2058815376.

The previous prime is 2112809117. The next prime is 2112809191. The reversal of 2112809189 is 9819082112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2112809189 - 2²⁸ = 1844373733 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 (2112809389) 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, 87389 + ... + 108914.

It is an arithmetic number, because the mean of its divisors is an integer number (270899520).

Almost surely, 2^2112809189 is an apocalyptic number.

It is an amenable number.

2112809189 is a deficient number, since it is larger than the sum of its proper divisors (54386971).

2112809189 is a wasteful number, since it uses less digits than its factorization.

2112809189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196579.

The product of its (nonzero) digits is 20736, while the sum is 41.

The square root of 2112809189 is about 45965.3041869626. The cubic root of 2112809189 is about 1283.1775684938.

The spelling of 2112809189 in words is "two billion, one hundred twelve million, eight hundred nine thousand, one hundred eighty-nine".