2189868633 has 6 divisors (see below), whose sum is σ = 3163143594. Its totient is φ = 1459912416.

The previous prime is 2189868631. The next prime is 2189868649. The reversal of 2189868633 is 3368689812.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2189116944 + 751689 = 46788^2 + 867^2 .

It is not a de Polignac number, because 2189868633 - 2¹ = 2189868631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2189868633.

It is not an unprimeable number, because it can be changed into a prime (2189868631) 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, 121659360 + ... + 121659377.

It is an arithmetic number, because the mean of its divisors is an integer number (527190599).

Almost surely, 2^2189868633 is an apocalyptic number.

It is an amenable number.

2189868633 is a deficient number, since it is larger than the sum of its proper divisors (973274961).

2189868633 is a wasteful number, since it uses less digits than its factorization.

2189868633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243318743 (or 243318740 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 2189868633 is about 46796.0322356501. The cubic root of 2189868633 is about 1298.5918940866.

The spelling of 2189868633 in words is "two billion, one hundred eighty-nine million, eight hundred sixty-eight thousand, six hundred thirty-three".