12918311 has 12 divisors (see below), whose sum is σ = 15547320. Its totient is φ = 10689840.

The previous prime is 12918293. The next prime is 12918319. The reversal of 12918311 is 11381921.

12918311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12918311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3125 + ... + 5966.

It is an arithmetic number, because the mean of its divisors is an integer number (1295610).

Almost surely, 2^12918311 is an apocalyptic number.

12918311 is a deficient number, since it is larger than the sum of its proper divisors (2629009).

12918311 is an equidigital number, since it uses as much as digits as its factorization.

12918311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9134 (or 9127 counting only the distinct ones).

The product of its digits is 432, while the sum is 26.

The square root of 12918311 is about 3594.2051972585. The cubic root of 12918311 is about 234.6399254010.

The spelling of 12918311 in words is "twelve million, nine hundred eighteen thousand, three hundred eleven".