12989647 has 4 divisors (see below), whose sum is σ = 14170536. Its totient is φ = 11808760.

The previous prime is 12989629. The next prime is 12989653. The reversal of 12989647 is 74698921.

12989647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12989647 - 2⁷ = 12989519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12989597 and 12989606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989657) 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 3 ways as a sum of consecutive naturals, for example, 590428 + ... + 590449.

It is an arithmetic number, because the mean of its divisors is an integer number (3542634).

Almost surely, 2^12989647 is an apocalyptic number.

12989647 is a deficient number, since it is larger than the sum of its proper divisors (1180889).

12989647 is a wasteful number, since it uses less digits than its factorization.

12989647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180888.

The product of its digits is 217728, while the sum is 46.

The square root of 12989647 is about 3604.1152867243. The cubic root of 12989647 is about 235.0710333026.

The spelling of 12989647 in words is "twelve million, nine hundred eighty-nine thousand, six hundred forty-seven".