12949687 has 4 divisors (see below), whose sum is σ = 13064400. Its totient is φ = 12834976.

The previous prime is 12949679. The next prime is 12949691. The reversal of 12949687 is 78694921.

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 12949687 - 2³ = 12949679 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 (12949627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57187 + ... + 57412.

It is an arithmetic number, because the mean of its divisors is an integer number (3266100).

Almost surely, 2^12949687 is an apocalyptic number.

12949687 is a deficient number, since it is larger than the sum of its proper divisors (114713).

12949687 is a wasteful number, since it uses less digits than its factorization.

12949687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114712.

The product of its digits is 217728, while the sum is 46.

The square root of 12949687 is about 3598.5673538229. The cubic root of 12949687 is about 234.8297363343.

The spelling of 12949687 in words is "twelve million, nine hundred forty-nine thousand, six hundred eighty-seven".