12817489 has 4 divisors (see below), whose sum is σ = 12831156. Its totient is φ = 12803824.

The previous prime is 12817481. The next prime is 12817517. The reversal of 12817489 is 98471821.

It is a happy number.

12817489 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 can be written as a sum of positive squares in 2 ways, for example, as 36864 + 12780625 = 192^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 12817489 - 2³ = 12817481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817481) 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, 5314 + ... + 7339.

It is an arithmetic number, because the mean of its divisors is an integer number (3207789).

Almost surely, 2^12817489 is an apocalyptic number.

It is an amenable number.

12817489 is a deficient number, since it is larger than the sum of its proper divisors (13667).

12817489 is a wasteful number, since it uses less digits than its factorization.

12817489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13666.

The product of its digits is 32256, while the sum is 40.

The square root of 12817489 is about 3580.1520917414. The cubic root of 12817489 is about 234.0279083766.

The spelling of 12817489 in words is "twelve million, eight hundred seventeen thousand, four hundred eighty-nine".