2189194045 has 4 divisors (see below), whose sum is σ = 2627032860. Its totient is φ = 1751355232.

The previous prime is 2189194031. The next prime is 2189194061. The reversal of 2189194045 is 5404919812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1087086841 + 1102107204 = 32971^2 + 33198^2 .

It is a cyclic number.

It is not a de Polignac number, because 2189194045 - 2⁹ = 2189193533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2189193992 and 2189194010.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 218919400 + ... + 218919409.

It is an arithmetic number, because the mean of its divisors is an integer number (656758215).

Almost surely, 2^2189194045 is an apocalyptic number.

It is an amenable number.

2189194045 is a deficient number, since it is larger than the sum of its proper divisors (437838815).

2189194045 is an equidigital number, since it uses as much as digits as its factorization.

2189194045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437838814.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 2189194045 is about 46788.8239326444. The cubic root of 2189194045 is about 1298.4585368519.

The spelling of 2189194045 in words is "two billion, one hundred eighty-nine million, one hundred ninety-four thousand, forty-five".