2189663 has 6 divisors (see below), whose sum is σ = 2547216. Its totient is φ = 1876812.

The previous prime is 2189647. The next prime is 2189699. The reversal of 2189663 is 3669812.

2189663 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2189663 - 2⁴ = 2189647 is a prime.

It is an Ulam number.

2189663 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22295 + ... + 22392.

It is an arithmetic number, because the mean of its divisors is an integer number (424536).

2^2189663 is an apocalyptic number.

2189663 is a deficient number, since it is larger than the sum of its proper divisors (357553).

2189663 is an equidigital number, since it uses as much as digits as its factorization.

2189663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44701 (or 44694 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 2189663 is about 1479.7509925660. The cubic root of 2189663 is about 129.8551246031.

The spelling of 2189663 in words is "two million, one hundred eighty-nine thousand, six hundred sixty-three".