12680009 has 4 divisors (see below), whose sum is σ = 12887940. Its totient is φ = 12472080.

The previous prime is 12679991. The next prime is 12680039. The reversal of 12680009 is 90008621.

12680009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3888784 + 8791225 = 1972^2 + 2965^2 .

It is a cyclic number.

It is not a de Polignac number, because 12680009 - 2⁸ = 12679753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12680009.

It is not an unprimeable number, because it can be changed into a prime (12680039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103874 + ... + 103995.

It is an arithmetic number, because the mean of its divisors is an integer number (3221985).

Almost surely, 2^12680009 is an apocalyptic number.

It is an amenable number.

12680009 is a deficient number, since it is larger than the sum of its proper divisors (207931).

12680009 is an equidigital number, since it uses as much as digits as its factorization.

12680009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207930.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12680009 is about 3560.9000266786. The cubic root of 12680009 is about 233.1881734316.

The spelling of 12680009 in words is "twelve million, six hundred eighty thousand, nine".