2005911 has 8 divisors (see below), whose sum is σ = 2971760. Its totient is φ = 1337256.

The previous prime is 2005903. The next prime is 2005919. The reversal of 2005911 is 1195002.

It is an interprime number because it is at equal distance from previous prime (2005903) and next prime (2005919).

It is not a de Polignac number, because 2005911 - 2³ = 2005903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2005919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37120 + ... + 37173.

It is an arithmetic number, because the mean of its divisors is an integer number (371470).

2^2005911 is an apocalyptic number.

2005911 is a deficient number, since it is larger than the sum of its proper divisors (965849).

2005911 is an equidigital number, since it uses as much as digits as its factorization.

2005911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74302 (or 74296 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 2005911 is about 1416.3018746016. The cubic root of 2005911 is about 126.1161061299.

It can be divided in two parts, 2005 and 911, that added together give a square (2916 = 54²).

The spelling of 2005911 in words is "two million, five thousand, nine hundred eleven".