2189128633 has 4 divisors (see below), whose sum is σ = 2189530240. Its totient is φ = 2188727028.

The previous prime is 2189128603. The next prime is 2189128637. The reversal of 2189128633 is 3368219812.

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 2189128633 - 2⁹ = 2189128121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2189128633.

It is not an unprimeable number, because it can be changed into a prime (2189128637) 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, 192513 + ... + 203566.

It is an arithmetic number, because the mean of its divisors is an integer number (547382560).

Almost surely, 2^2189128633 is an apocalyptic number.

It is an amenable number.

2189128633 is a deficient number, since it is larger than the sum of its proper divisors (401607).

2189128633 is an equidigital number, since it uses as much as digits as its factorization.

2189128633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401606.

The product of its digits is 124416, while the sum is 43.

The square root of 2189128633 is about 46788.1249143412. The cubic root of 2189128633 is about 1298.4456042971.

The spelling of 2189128633 in words is "two billion, one hundred eighty-nine million, one hundred twenty-eight thousand, six hundred thirty-three".