2189100987 has 12 divisors (see below), whose sum is σ = 3239158104. Its totient is φ = 1423805280.

The previous prime is 2189100973. The next prime is 2189101003. The reversal of 2189100987 is 7890019812.

It is not a de Polignac number, because 2189100987 - 2¹⁰ = 2189099963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2189100917) 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 11 ways as a sum of consecutive naturals, for example, 2965893 + ... + 2966630.

It is an arithmetic number, because the mean of its divisors is an integer number (269929842).

Almost surely, 2^2189100987 is an apocalyptic number.

2189100987 is a deficient number, since it is larger than the sum of its proper divisors (1050057117).

2189100987 is a wasteful number, since it uses less digits than its factorization.

2189100987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932570 (or 5932567 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 45.

The square root of 2189100987 is about 46787.8294751958. The cubic root of 2189100987 is about 1298.4401383508.

The spelling of 2189100987 in words is "two billion, one hundred eighty-nine million, one hundred thousand, nine hundred eighty-seven".