12308209 has 8 divisors (see below), whose sum is σ = 13144320. Its totient is φ = 11499600.

The previous prime is 12308207. The next prime is 12308227. The reversal of 12308209 is 90280321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12308209 - 2¹ = 12308207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12308201) 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, 5947 + ... + 7744.

It is an arithmetic number, because the mean of its divisors is an integer number (1643040).

Almost surely, 2^12308209 is an apocalyptic number.

It is an amenable number.

12308209 is a deficient number, since it is larger than the sum of its proper divisors (836111).

12308209 is a wasteful number, since it uses less digits than its factorization.

12308209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13751.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12308209 is about 3508.3057164392. The cubic root of 12308209 is about 230.8863655285.

The spelling of 12308209 in words is "twelve million, three hundred eight thousand, two hundred nine".