2009911 has 2 divisors, whose sum is σ = 2009912. Its totient is φ = 2009910.

The previous prime is 2009897. The next prime is 2009921. The reversal of 2009911 is 1199002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2009911 - 2⁵ = 2009879 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004955 + 1004956.

It is an arithmetic number, because the mean of its divisors is an integer number (1004956).

2^2009911 is an apocalyptic number.

2009911 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009911 is an equidigital number, since it uses as much as digits as its factorization.

2009911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 2009911 is about 1417.7132996484. The cubic root of 2009911 is about 126.1998801154.

The spelling of 2009911 in words is "two million, nine thousand, nine hundred eleven".