2160981889 has 4 divisors (see below), whose sum is σ = 2357434800. Its totient is φ = 1964528980.

The previous prime is 2160981869. The next prime is 2160981919. The reversal of 2160981889 is 9881890612.

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 a cyclic number.

It is not a de Polignac number, because 2160981889 - 2¹⁵ = 2160949121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2160981869) 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, 98226439 + ... + 98226460.

It is an arithmetic number, because the mean of its divisors is an integer number (589358700).

Almost surely, 2^2160981889 is an apocalyptic number.

It is an amenable number.

2160981889 is a deficient number, since it is larger than the sum of its proper divisors (196452911).

2160981889 is a wasteful number, since it uses less digits than its factorization.

2160981889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196452910.

The product of its (nonzero) digits is 497664, while the sum is 52.

The square root of 2160981889 is about 46486.3623980195. The cubic root of 2160981889 is about 1292.8566561732.

The spelling of 2160981889 in words is "two billion, one hundred sixty million, nine hundred eighty-one thousand, eight hundred eighty-nine".