2005584891 has 4 divisors (see below), whose sum is σ = 2674113192. Its totient is φ = 1337056592.

The previous prime is 2005584883. The next prime is 2005584937. The reversal of 2005584891 is 1984855002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2005584891 - 2³ = 2005584883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2005584851) 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, 334264146 + ... + 334264151.

It is an arithmetic number, because the mean of its divisors is an integer number (668528298).

Almost surely, 2^2005584891 is an apocalyptic number.

2005584891 is a deficient number, since it is larger than the sum of its proper divisors (668528301).

2005584891 is an equidigital number, since it uses as much as digits as its factorization.

2005584891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668528300.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 2005584891 is about 44783.7569996087. The cubic root of 2005584891 is about 1261.0927135904.

The spelling of 2005584891 in words is "two billion, five million, five hundred eighty-four thousand, eight hundred ninety-one".