12727989 has 8 divisors (see below), whose sum is σ = 18856320. Its totient is φ = 8485308.

The previous prime is 12727987. The next prime is 12727991. The reversal of 12727989 is 98972721.

12727989 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12727987) and next prime (12727991).

It is not a de Polignac number, because 12727989 - 2¹ = 12727987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12727987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235677 + ... + 235730.

It is an arithmetic number, because the mean of its divisors is an integer number (2357040).

Almost surely, 2^12727989 is an apocalyptic number.

It is an amenable number.

12727989 is a deficient number, since it is larger than the sum of its proper divisors (6128331).

12727989 is an equidigital number, since it uses as much as digits as its factorization.

12727989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471416 (or 471410 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 12727989 is about 3567.6307264065. The cubic root of 12727989 is about 233.4819241755.

It can be divided in two parts, 1272 and 7989, that added together give a cube (9261 = 21³).

The spelling of 12727989 in words is "twelve million, seven hundred twenty-seven thousand, nine hundred eighty-nine".