11440391 has 2 divisors, whose sum is σ = 11440392. Its totient is φ = 11440390.

The previous prime is 11440357. The next prime is 11440393. The reversal of 11440391 is 19304411.

11440391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11440391 - 2¹⁸ = 11178247 is a prime.

It is a Sophie Germain prime.

Together with 11440393, 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 (11440393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5720195 + 5720196.

It is an arithmetic number, because the mean of its divisors is an integer number (5720196).

Almost surely, 2^11440391 is an apocalyptic number.

11440391 is a deficient number, since it is larger than the sum of its proper divisors (1).

11440391 is an equidigital number, since it uses as much as digits as its factorization.

11440391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 11440391 is about 3382.3647053504. The cubic root of 11440391 is about 225.3272013103.

The spelling of 11440391 in words is "eleven million, four hundred forty thousand, three hundred ninety-one".