12143689 has 2 divisors, whose sum is σ = 12143690. Its totient is φ = 12143688.

The previous prime is 12143687. The next prime is 12143693. The reversal of 12143689 is 98634121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 1646089 = 3240^2 + 1283^2 .

It is an emirp because it is prime and its reverse (98634121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12143689 - 2¹ = 12143687 is a prime.

Together with 12143687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12143687) 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, 6071844 + 6071845.

It is an arithmetic number, because the mean of its divisors is an integer number (6071845).

Almost surely, 2^12143689 is an apocalyptic number.

It is an amenable number.

12143689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12143689 is an equidigital number, since it uses as much as digits as its factorization.

12143689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 12143689 is about 3484.7796200047. The cubic root of 12143689 is about 229.8530188834.

The spelling of 12143689 in words is "twelve million, one hundred forty-three thousand, six hundred eighty-nine".