2173289091 has 32 divisors (see below), whose sum is σ = 3077803008. Its totient is φ = 1362159360.

The previous prime is 2173289057. The next prime is 2173289099. The reversal of 2173289091 is 1909823712.

It is not a de Polignac number, because 2173289091 - 2⁷ = 2173288963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2173289099) 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 31 ways as a sum of consecutive naturals, for example, 484726 + ... + 489188.

It is an arithmetic number, because the mean of its divisors is an integer number (96181344).

Almost surely, 2^2173289091 is an apocalyptic number.

2173289091 is a deficient number, since it is larger than the sum of its proper divisors (904513917).

2173289091 is a wasteful number, since it uses less digits than its factorization.

2173289091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4651.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 2173289091 is about 46618.5487869367. The cubic root of 2173289091 is about 1295.3063661989.

The spelling of 2173289091 in words is "two billion, one hundred seventy-three million, two hundred eighty-nine thousand, ninety-one".