13955686 has 4 divisors (see below), whose sum is σ = 20933532. Its totient is φ = 6977842.

The previous prime is 13955659. The next prime is 13955707. The reversal of 13955686 is 68655931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68655931 = 7211 ⋅9521.

It is a super-2 number, since 2×13955686² = 389522343461192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3488920 + ... + 3488923.

It is an arithmetic number, because the mean of its divisors is an integer number (5233383).

Almost surely, 2^13955686 is an apocalyptic number.

13955686 is a deficient number, since it is larger than the sum of its proper divisors (6977846).

13955686 is an equidigital number, since it uses as much as digits as its factorization.

13955686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977845.

The product of its digits is 194400, while the sum is 43.

The square root of 13955686 is about 3735.7309860321. The cubic root of 13955686 is about 240.7596646788.

It can be divided in two parts, 13955 and 686, that added together give a palindrome (14641).

The spelling of 13955686 in words is "thirteen million, nine hundred fifty-five thousand, six hundred eighty-six".