2189766289 has 2 divisors, whose sum is σ = 2189766290. Its totient is φ = 2189766288.

The previous prime is 2189766211. The next prime is 2189766329. The reversal of 2189766289 is 9826679812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2117380225 + 72386064 = 46015^2 + 8508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2189766289 is a prime.

It is not a weakly prime, because it can be changed into another prime (2189766389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094883144 + 1094883145.

It is an arithmetic number, because the mean of its divisors is an integer number (1094883145).

Almost surely, 2^2189766289 is an apocalyptic number.

It is an amenable number.

2189766289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189766289 is an equidigital number, since it uses as much as digits as its factorization.

2189766289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 58.

The square root of 2189766289 is about 46794.9387113607. The cubic root of 2189766289 is about 1298.5716637773.

The spelling of 2189766289 in words is "two billion, one hundred eighty-nine million, seven hundred sixty-six thousand, two hundred eighty-nine".