12649989 has 16 divisors (see below), whose sum is σ = 19483200. Its totient is φ = 7215360.

The previous prime is 12649979. The next prime is 12649993. The reversal of 12649989 is 98994621.

12649989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12649989 - 2⁵ = 12649957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10714 + ... + 11835.

It is an arithmetic number, because the mean of its divisors is an integer number (1217700).

Almost surely, 2^12649989 is an apocalyptic number.

It is an amenable number.

12649989 is a deficient number, since it is larger than the sum of its proper divisors (6833211).

12649989 is a wasteful number, since it uses less digits than its factorization.

12649989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22580.

The product of its digits is 279936, while the sum is 48.

The square root of 12649989 is about 3556.6823023711. The cubic root of 12649989 is about 233.0040031977.

The spelling of 12649989 in words is "twelve million, six hundred forty-nine thousand, nine hundred eighty-nine".