12909616 has 20 divisors (see below), whose sum is σ = 25069824. Its totient is φ = 6440000.

The previous prime is 12909593. The next prime is 12909623. The reversal of 12909616 is 61690921.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10641 + ... + 11791.

Almost surely, 2^12909616 is an apocalyptic number.

12909616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12909616 is a deficient number, since it is larger than the sum of its proper divisors (12160208).

12909616 is a wasteful number, since it uses less digits than its factorization.

12909616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1854 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 12909616 is about 3592.9954077343. The cubic root of 12909616 is about 234.5872701156.

The spelling of 12909616 in words is "twelve million, nine hundred nine thousand, six hundred sixteen".