12135689 has 2 divisors, whose sum is σ = 12135690. Its totient is φ = 12135688.

The previous prime is 12135677. The next prime is 12135701. The reversal of 12135689 is 98653121.

It is a balanced prime because it is at equal distance from previous prime (12135677) and next prime (12135701).

It can be written as a sum of positive squares in only one way, i.e., 12020089 + 115600 = 3467^2 + 340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12135689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12135289) 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, 6067844 + 6067845.

It is an arithmetic number, because the mean of its divisors is an integer number (6067845).

Almost surely, 2^12135689 is an apocalyptic number.

It is an amenable number.

12135689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12135689 is an equidigital number, since it uses as much as digits as its factorization.

12135689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 12135689 is about 3483.6315821281. The cubic root of 12135689 is about 229.8025337277.

The spelling of 12135689 in words is "twelve million, one hundred thirty-five thousand, six hundred eighty-nine".