12231689 has 2 divisors, whose sum is σ = 12231690. Its totient is φ = 12231688.

The previous prime is 12231679. The next prime is 12231691. The reversal of 12231689 is 98613221.

12231689 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 can be written as a sum of positive squares in only one way, i.e., 12020089 + 211600 = 3467^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 12231689 - 2⁸ = 12231433 is a prime.

It is a super-2 number, since 2×12231689² = 299228431585442, which contains 22 as substring.

Together with 12231691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12231629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115844 + 6115845.

It is an arithmetic number, because the mean of its divisors is an integer number (6115845).

Almost surely, 2^12231689 is an apocalyptic number.

It is an amenable number.

12231689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231689 is an equidigital number, since it uses as much as digits as its factorization.

12231689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 12231689 is about 3497.3831645961. The cubic root of 12231689 is about 230.4068978713.

The spelling of 12231689 in words is "twelve million, two hundred thirty-one thousand, six hundred eighty-nine".