12863887 has 4 divisors (see below), whose sum is σ = 12877200. Its totient is φ = 12850576.

The previous prime is 12863881. The next prime is 12863891. The reversal of 12863887 is 78836821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78836821 = 7 ⋅11262403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12863887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12863881) 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, 5083 + ... + 7180.

It is an arithmetic number, because the mean of its divisors is an integer number (3219300).

Almost surely, 2^12863887 is an apocalyptic number.

12863887 is a deficient number, since it is larger than the sum of its proper divisors (13313).

12863887 is a wasteful number, since it uses less digits than its factorization.

12863887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13312.

The product of its digits is 129024, while the sum is 43.

The square root of 12863887 is about 3586.6261305020. The cubic root of 12863887 is about 234.3099540265.

The spelling of 12863887 in words is "twelve million, eight hundred sixty-three thousand, eight hundred eighty-seven".