2011439 has 2 divisors, whose sum is σ = 2011440. Its totient is φ = 2011438.

The previous prime is 2011417. The next prime is 2011441. The reversal of 2011439 is 9341102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011439 - 2⁸ = 2011183 is a prime.

Together with 2011441, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2011439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005719 + 1005720.

It is an arithmetic number, because the mean of its divisors is an integer number (1005720).

2^2011439 is an apocalyptic number.

2011439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011439 is an equidigital number, since it uses as much as digits as its factorization.

2011439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2011439 is about 1418.2520932472. The cubic root of 2011439 is about 126.2318524384.

The spelling of 2011439 in words is "two million, eleven thousand, four hundred thirty-nine".