2191043593 has 4 divisors (see below), whose sum is σ = 2203284240. Its totient is φ = 2178802948.

The previous prime is 2191043587. The next prime is 2191043597. The reversal of 2191043593 is 3953401912.

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 2191043593 - 2²⁵ = 2157489161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2191043597) 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 3 ways as a sum of consecutive naturals, for example, 6120055 + ... + 6120412.

It is an arithmetic number, because the mean of its divisors is an integer number (550821060).

Almost surely, 2^2191043593 is an apocalyptic number.

It is an amenable number.

2191043593 is a deficient number, since it is larger than the sum of its proper divisors (12240647).

2191043593 is a wasteful number, since it uses less digits than its factorization.

2191043593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12240646.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 2191043593 is about 46808.5846079541. The cubic root of 2191043593 is about 1298.8241029515.

The spelling of 2191043593 in words is "two billion, one hundred ninety-one million, forty-three thousand, five hundred ninety-three".