2189505705 has 16 divisors (see below), whose sum is σ = 3504263040. Its totient is φ = 1167385088.

The previous prime is 2189505697. The next prime is 2189505709. The reversal of 2189505705 is 5075059812.

It is a cyclic number.

It is not a de Polignac number, because 2189505705 - 2³ = 2189505697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2189505709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34201 + ... + 74489.

It is an arithmetic number, because the mean of its divisors is an integer number (219016440).

Almost surely, 2^2189505705 is an apocalyptic number.

It is an amenable number.

2189505705 is a deficient number, since it is larger than the sum of its proper divisors (1314757335).

2189505705 is a wasteful number, since it uses less digits than its factorization.

2189505705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43920.

The product of its (nonzero) digits is 126000, while the sum is 42.

The square root of 2189505705 is about 46792.1543103115. The cubic root of 2189505705 is about 1298.5201513665.

The spelling of 2189505705 in words is "two billion, one hundred eighty-nine million, five hundred five thousand, seven hundred five".