12318289 has 4 divisors (see below), whose sum is σ = 12966640. Its totient is φ = 11669940.

The previous prime is 12318283. The next prime is 12318329. The reversal of 12318289 is 98281321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12318289 - 2¹³ = 12310097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12318283) 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, 324147 + ... + 324184.

It is an arithmetic number, because the mean of its divisors is an integer number (3241660).

Almost surely, 2^12318289 is an apocalyptic number.

12318289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12318289 is a deficient number, since it is larger than the sum of its proper divisors (648351).

12318289 is an equidigital number, since it uses as much as digits as its factorization.

12318289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648350.

The product of its digits is 6912, while the sum is 34.

The square root of 12318289 is about 3509.7420133109. The cubic root of 12318289 is about 230.9493776618.

The spelling of 12318289 in words is "twelve million, three hundred eighteen thousand, two hundred eighty-nine".