11667911 has 2 divisors, whose sum is σ = 11667912. Its totient is φ = 11667910.

The previous prime is 11667907. The next prime is 11667917. The reversal of 11667911 is 11976611.

It is a weak prime.

It is an emirp because it is prime and its reverse (11976611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11667911 - 2² = 11667907 is a prime.

It is a super-2 number, since 2×11667911² = 272280294207842, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11667917) 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, 5833955 + 5833956.

It is an arithmetic number, because the mean of its divisors is an integer number (5833956).

Almost surely, 2^11667911 is an apocalyptic number.

11667911 is a deficient number, since it is larger than the sum of its proper divisors (1).

11667911 is an equidigital number, since it uses as much as digits as its factorization.

11667911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The square root of 11667911 is about 3415.8324022118. The cubic root of 11667911 is about 226.8111336343.

The spelling of 11667911 in words is "eleven million, six hundred sixty-seven thousand, nine hundred eleven".