12689123 has 18 divisors (see below), whose sum is σ = 14260764. Its totient is φ = 11285824.

The previous prime is 12689099. The next prime is 12689129. The reversal of 12689123 is 32198621.

It is not a de Polignac number, because 12689123 - 2⁸ = 12688867 is a prime.

It is a super-2 number, since 2×12689123² = 322027685018258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12689123.

It is not an unprimeable number, because it can be changed into a prime (12689129) 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 in 17 ways as a sum of consecutive naturals, for example, 152840 + ... + 152922.

Almost surely, 2^12689123 is an apocalyptic number.

12689123 is a deficient number, since it is larger than the sum of its proper divisors (1571641).

12689123 is an equidigital number, since it uses as much as digits as its factorization.

12689123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 123 counting only the distinct ones).

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

The square root of 12689123 is about 3562.1795294454. The cubic root of 12689123 is about 233.2440295439.

The spelling of 12689123 in words is "twelve million, six hundred eighty-nine thousand, one hundred twenty-three".