12909814 has 16 divisors (see below), whose sum is σ = 20236320. Its totient is φ = 6168960.

The previous prime is 12909773. The next prime is 12909833. The reversal of 12909814 is 41890921.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12909814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4894 + ... + 7054.

It is an arithmetic number, because the mean of its divisors is an integer number (1264770).

Almost surely, 2^12909814 is an apocalyptic number.

12909814 is a deficient number, since it is larger than the sum of its proper divisors (7326506).

12909814 is a wasteful number, since it uses less digits than its factorization.

12909814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 12909814 is about 3593.0229612403. The cubic root of 12909814 is about 234.5884694294.

The spelling of 12909814 in words is "twelve million, nine hundred nine thousand, eight hundred fourteen".