12887889 has 16 divisors (see below), whose sum is σ = 20493312. Its totient is φ = 7044048.

The previous prime is 12887873. The next prime is 12887893. The reversal of 12887889 is 98878821.

It is a happy number.

It is not a de Polignac number, because 12887889 - 2⁴ = 12887873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12887869) 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 15 ways as a sum of consecutive naturals, for example, 12859 + ... + 13824.

It is an arithmetic number, because the mean of its divisors is an integer number (1280832).

Almost surely, 2^12887889 is an apocalyptic number.

It is an amenable number.

12887889 is a deficient number, since it is larger than the sum of its proper divisors (7605423).

12887889 is a wasteful number, since it uses less digits than its factorization.

12887889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26716.

The product of its digits is 516096, while the sum is 51.

The square root of 12887889 is about 3589.9706126931. The cubic root of 12887889 is about 234.4555920534.

The spelling of 12887889 in words is "twelve million, eight hundred eighty-seven thousand, eight hundred eighty-nine".