13655986 has 4 divisors (see below), whose sum is σ = 20483982. Its totient is φ = 6827992.

The previous prime is 13655959. The next prime is 13655989. The reversal of 13655986 is 68955631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 4923961 = 2955^2 + 2219^2 .

It is not an unprimeable number, because it can be changed into a prime (13655989) 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, 3413995 + ... + 3413998.

Almost surely, 2^13655986 is an apocalyptic number.

13655986 is a deficient number, since it is larger than the sum of its proper divisors (6827996).

13655986 is an equidigital number, since it uses as much as digits as its factorization.

13655986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6827995.

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

The square root of 13655986 is about 3695.4006548682. The cubic root of 13655986 is about 239.0237308883.

It can be divided in two parts, 13655 and 986, that added together give a palindrome (14641).

The spelling of 13655986 in words is "thirteen million, six hundred fifty-five thousand, nine hundred eighty-six".