11969 has 2 divisors, whose sum is σ = 11970. Its totient is φ = 11968.

The previous prime is 11959. The next prime is 11971. The reversal of 11969 is 96911.

11969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7744 + 4225 = 88^2 + 65^2 .

It is an emirp because it is prime and its reverse (96911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11969 - 2⁴ = 11953 is a prime.

It is a super-2 number, since 2×11969² = 286513922, which contains 22 as substring.

Together with 11971, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (11909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5984 + 5985.

It is an arithmetic number, because the mean of its divisors is an integer number (5985).

2¹¹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

11969 is a deficient number, since it is larger than the sum of its proper divisors (1).

11969 is an equidigital number, since it uses as much as digits as its factorization.

11969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 26.

The square root of 11969 is about 109.4029250066. The cubic root of 11969 is about 22.8745533272.

The spelling of 11969 in words is "eleven thousand, nine hundred sixty-nine".