12208709 has 4 divisors (see below), whose sum is σ = 12439116. Its totient is φ = 11978304.

The previous prime is 12208667. The next prime is 12208733. The reversal of 12208709 is 90780221.

It is a happy number.

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 9796900 + 2411809 = 3130^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 12208709 - 2⁸ = 12208453 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12208769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115124 + ... + 115229.

It is an arithmetic number, because the mean of its divisors is an integer number (3109779).

Almost surely, 2^12208709 is an apocalyptic number.

It is an amenable number.

12208709 is a deficient number, since it is larger than the sum of its proper divisors (230407).

12208709 is an equidigital number, since it uses as much as digits as its factorization.

12208709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230406.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 12208709 is about 3494.0963066292. The cubic root of 12208709 is about 230.2625168902.

The spelling of 12208709 in words is "twelve million, two hundred eight thousand, seven hundred nine".