13727986 has 4 divisors (see below), whose sum is σ = 20591982. Its totient is φ = 6863992.

The previous prime is 13727981. The next prime is 13728037. The reversal of 13727986 is 68972731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68972731 = 43 ⋅1604017.

It can be written as a sum of positive squares in only one way, i.e., 13727025 + 961 = 3705^2 + 31^2 .

It is not an unprimeable number, because it can be changed into a prime (13727981) 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 as a sum of consecutive naturals, namely, 3431995 + ... + 3431998.

Almost surely, 2^13727986 is an apocalyptic number.

13727986 is a deficient number, since it is larger than the sum of its proper divisors (6863996).

13727986 is an equidigital number, since it uses as much as digits as its factorization.

13727986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6863995.

The product of its digits is 127008, while the sum is 43.

The square root of 13727986 is about 3705.1296873389. The cubic root of 13727986 is about 239.4430720559.

The spelling of 13727986 in words is "thirteen million, seven hundred twenty-seven thousand, nine hundred eighty-six".