12988187 has 4 divisors (see below), whose sum is σ = 13752216. Its totient is φ = 12224160.

The previous prime is 12988159. The next prime is 12988207. The reversal of 12988187 is 78188921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78188921 = 43 ⋅1818347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12988187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12988487) 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 3 ways as a sum of consecutive naturals, for example, 381989 + ... + 382022.

It is an arithmetic number, because the mean of its divisors is an integer number (3438054).

Almost surely, 2^12988187 is an apocalyptic number.

12988187 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12988187 is a deficient number, since it is larger than the sum of its proper divisors (764029).

12988187 is an equidigital number, since it uses as much as digits as its factorization.

12988187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764028.

The product of its digits is 64512, while the sum is 44.

The square root of 12988187 is about 3603.9127347926. The cubic root of 12988187 is about 235.0622258636.

The spelling of 12988187 in words is "twelve million, nine hundred eighty-eight thousand, one hundred eighty-seven".