11965771 has 2 divisors, whose sum is σ = 11965772. Its totient is φ = 11965770.

The previous prime is 11965769. The next prime is 11965781. The reversal of 11965771 is 17756911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11965771 - 2¹ = 11965769 is a prime.

Together with 11965769, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11965771.

It is not a weakly prime, because it can be changed into another prime (11965741) 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, 5982885 + 5982886.

It is an arithmetic number, because the mean of its divisors is an integer number (5982886).

Almost surely, 2^11965771 is an apocalyptic number.

11965771 is a deficient number, since it is larger than the sum of its proper divisors (1).

11965771 is an equidigital number, since it uses as much as digits as its factorization.

11965771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 37.

The square root of 11965771 is about 3459.1575564001. The cubic root of 11965771 is about 228.7249610783.

The spelling of 11965771 in words is "eleven million, nine hundred sixty-five thousand, seven hundred seventy-one".