12909311 has 4 divisors (see below), whose sum is σ = 13072800. Its totient is φ = 12745824.

The previous prime is 12909283. The next prime is 12909313. The reversal of 12909311 is 11390921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12909311 - 2¹⁴ = 12892927 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 (12909313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81626 + ... + 81783.

It is an arithmetic number, because the mean of its divisors is an integer number (3268200).

Almost surely, 2^12909311 is an apocalyptic number.

12909311 is a deficient number, since it is larger than the sum of its proper divisors (163489).

12909311 is an equidigital number, since it uses as much as digits as its factorization.

12909311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163488.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 12909311 is about 3592.9529637890. The cubic root of 12909311 is about 234.5854226638.

It can be divided in two parts, 1290 and 9311, that added together give a palindrome (10601).

The spelling of 12909311 in words is "twelve million, nine hundred nine thousand, three hundred eleven".