13681646 has 8 divisors (see below), whose sum is σ = 22388184. Its totient is φ = 6218920.

The previous prime is 13681643. The next prime is 13681663. The reversal of 13681646 is 64618631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13681643) 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, 310925 + ... + 310968.

It is an arithmetic number, because the mean of its divisors is an integer number (2798523).

Almost surely, 2^13681646 is an apocalyptic number.

13681646 is a deficient number, since it is larger than the sum of its proper divisors (8706538).

13681646 is a wasteful number, since it uses less digits than its factorization.

13681646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621906.

The product of its digits is 20736, while the sum is 35.

The square root of 13681646 is about 3698.8709088045. The cubic root of 13681646 is about 239.1733480930.

The spelling of 13681646 in words is "thirteen million, six hundred eighty-one thousand, six hundred forty-six".