12208009 has 16 divisors (see below), whose sum is σ = 14108544. Its totient is φ = 10454400.

The previous prime is 12207977. The next prime is 12208019. The reversal of 12208009 is 90080221.

12208009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12208009 - 2⁵ = 12207977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12208019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18139 + ... + 18799.

It is an arithmetic number, because the mean of its divisors is an integer number (881784).

Almost surely, 2^12208009 is an apocalyptic number.

It is an amenable number.

12208009 is a deficient number, since it is larger than the sum of its proper divisors (1900535).

12208009 is a wasteful number, since it uses less digits than its factorization.

12208009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 12208009 is about 3493.9961362314. The cubic root of 12208009 is about 230.2581160197.

It can be divided in two parts, 1220 and 8009, that added together give a palindrome (9229).

The spelling of 12208009 in words is "twelve million, two hundred eight thousand, nine".