12863439 has 12 divisors (see below), whose sum is σ = 18618600. Its totient is φ = 8558064.

The previous prime is 12863429. The next prime is 12863453. The reversal of 12863439 is 93436821.

12863439 is a `hidden beast` number, since 12 + 8 + 634 + 3 + 9 = 666.

It is not a de Polignac number, because 12863439 - 2¹¹ = 12861391 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12863429) 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 11 ways as a sum of consecutive naturals, for example, 4417 + ... + 6725.

It is an arithmetic number, because the mean of its divisors is an integer number (1551550).

Almost surely, 2^12863439 is an apocalyptic number.

12863439 is a deficient number, since it is larger than the sum of its proper divisors (5755161).

12863439 is a wasteful number, since it uses less digits than its factorization.

12863439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934 (or 2931 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 12863439 is about 3586.5636757208. The cubic root of 12863439 is about 234.3072339550.

The spelling of 12863439 in words is "twelve million, eight hundred sixty-three thousand, four hundred thirty-nine".