12989437 has 4 divisors (see below), whose sum is σ = 13265856. Its totient is φ = 12713020.

The previous prime is 12989429. The next prime is 12989441. The reversal of 12989437 is 73498921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73498921 = 2579 ⋅28499.

It is a cyclic number.

It is not a de Polignac number, because 12989437 - 2³ = 12989429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12989393 and 12989402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138139 + ... + 138232.

It is an arithmetic number, because the mean of its divisors is an integer number (3316464).

Almost surely, 2^12989437 is an apocalyptic number.

It is an amenable number.

12989437 is a deficient number, since it is larger than the sum of its proper divisors (276419).

12989437 is an equidigital number, since it uses as much as digits as its factorization.

12989437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276418.

The product of its digits is 108864, while the sum is 43.

The square root of 12989437 is about 3604.0861532433. The cubic root of 12989437 is about 235.0697665198.

The spelling of 12989437 in words is "twelve million, nine hundred eighty-nine thousand, four hundred thirty-seven".