11211439 has 2 divisors, whose sum is σ = 11211440. Its totient is φ = 11211438.

The previous prime is 11211437. The next prime is 11211457. The reversal of 11211439 is 93411211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11211439 - 2¹ = 11211437 is a prime.

Together with 11211437, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11211437) 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, 5605719 + 5605720.

It is an arithmetic number, because the mean of its divisors is an integer number (5605720).

Almost surely, 2^11211439 is an apocalyptic number.

11211439 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211439 is an equidigital number, since it uses as much as digits as its factorization.

11211439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 22.

The square root of 11211439 is about 3348.3486974925. The cubic root of 11211439 is about 223.8139332299.

The spelling of 11211439 in words is "eleven million, two hundred eleven thousand, four hundred thirty-nine".