11147911 has 2 divisors, whose sum is σ = 11147912. Its totient is φ = 11147910.

The previous prime is 11147909. The next prime is 11147921. The reversal of 11147911 is 11974111.

It is a weak prime.

It is an emirp because it is prime and its reverse (11974111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11147911 - 2¹ = 11147909 is a prime.

Together with 11147909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11147921) 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, 5573955 + 5573956.

It is an arithmetic number, because the mean of its divisors is an integer number (5573956).

Almost surely, 2^11147911 is an apocalyptic number.

11147911 is a deficient number, since it is larger than the sum of its proper divisors (1).

11147911 is an equidigital number, since it uses as much as digits as its factorization.

11147911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 25.

The square root of 11147911 is about 3338.8487536874. The cubic root of 11147911 is about 223.3903958050.

It can be divided in two parts, 1114 and 7911, that added together give a square (9025 = 95²).

The spelling of 11147911 in words is "eleven million, one hundred forty-seven thousand, nine hundred eleven".