13681651 has 4 divisors (see below), whose sum is σ = 14486472. Its totient is φ = 12876832.

The previous prime is 13681643. The next prime is 13681663. The reversal of 13681651 is 15618631.

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

It is a cyclic number.

It is not a de Polignac number, because 13681651 - 2³ = 13681643 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13681621) 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, 402385 + ... + 402418.

It is an arithmetic number, because the mean of its divisors is an integer number (3621618).

Almost surely, 2^13681651 is an apocalyptic number.

13681651 is a deficient number, since it is larger than the sum of its proper divisors (804821).

13681651 is an equidigital number, since it uses as much as digits as its factorization.

13681651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804820.

The product of its digits is 4320, while the sum is 31.

The square root of 13681651 is about 3698.8715846863. The cubic root of 13681651 is about 239.1733772285.

The spelling of 13681651 in words is "thirteen million, six hundred eighty-one thousand, six hundred fifty-one".