13686947 has 4 divisors (see below), whose sum is σ = 13771080. Its totient is φ = 13602816.

The previous prime is 13686941. The next prime is 13686971. The reversal of 13686947 is 74968631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74968631 = 151 ⋅496481.

It is a cyclic number.

It is not a de Polignac number, because 13686947 - 2⁴ = 13686931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13686898 and 13686907.

It is not an unprimeable number, because it can be changed into a prime (13686941) by changing a digit.

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, 41822 + ... + 42147.

It is an arithmetic number, because the mean of its divisors is an integer number (3442770).

Almost surely, 2^13686947 is an apocalyptic number.

13686947 is a deficient number, since it is larger than the sum of its proper divisors (84133).

13686947 is an equidigital number, since it uses as much as digits as its factorization.

13686947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84132.

The product of its digits is 217728, while the sum is 44.

The square root of 13686947 is about 3699.5874094282. The cubic root of 13686947 is about 239.2042336119.

The spelling of 13686947 in words is "thirteen million, six hundred eighty-six thousand, nine hundred forty-seven".