12809318 has 4 divisors (see below), whose sum is σ = 19213980. Its totient is φ = 6404658.

The previous prime is 12809317. The next prime is 12809327. The reversal of 12809318 is 81390821.

12809318 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 is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12809317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202328 + ... + 3202331.

It is an arithmetic number, because the mean of its divisors is an integer number (4803495).

Almost surely, 2^12809318 is an apocalyptic number.

12809318 is a deficient number, since it is larger than the sum of its proper divisors (6404662).

12809318 is an equidigital number, since it uses as much as digits as its factorization.

12809318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404661.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 12809318 is about 3579.0107571786. The cubic root of 12809318 is about 233.9781677832.

The spelling of 12809318 in words is "twelve million, eight hundred nine thousand, three hundred eighteen".