12689533 has 4 divisors (see below), whose sum is σ = 12850240. Its totient is φ = 12528828.

The previous prime is 12689507. The next prime is 12689581. The reversal of 12689533 is 33598621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12689533 - 2²¹ = 10592381 is a prime.

It is a super-2 number, since 2×12689533² = 322048495516178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12689492 and 12689501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689233) 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 in 3 ways as a sum of consecutive naturals, for example, 80235 + ... + 80392.

It is an arithmetic number, because the mean of its divisors is an integer number (3212560).

Almost surely, 2^12689533 is an apocalyptic number.

It is an amenable number.

12689533 is a deficient number, since it is larger than the sum of its proper divisors (160707).

12689533 is an equidigital number, since it uses as much as digits as its factorization.

12689533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160706.

The product of its digits is 38880, while the sum is 37.

The square root of 12689533 is about 3562.2370780171. The cubic root of 12689533 is about 233.2465416435.

It can be divided in two parts, 1268 and 9533, that added together give a palindrome (10801).

The spelling of 12689533 in words is "twelve million, six hundred eighty-nine thousand, five hundred thirty-three".