12989187 has 32 divisors (see below), whose sum is σ = 20347200. Its totient is φ = 8176896.

The previous prime is 12989161. The next prime is 12989189. The reversal of 12989187 is 78198921.

It is not a de Polignac number, because 12989187 - 2⁷ = 12989059 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (12989189) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41343 + ... + 41655.

It is an arithmetic number, because the mean of its divisors is an integer number (635850).

Almost surely, 2^12989187 is an apocalyptic number.

12989187 is a deficient number, since it is larger than the sum of its proper divisors (7358013).

12989187 is a wasteful number, since it uses less digits than its factorization.

12989187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 398 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 12989187 is about 3604.0514702207. The cubic root of 12989187 is about 235.0682584273.

The spelling of 12989187 in words is "twelve million, nine hundred eighty-nine thousand, one hundred eighty-seven".