13986846721 has 4 divisors (see below), whose sum is σ = 13990269744. Its totient is φ = 13983423700.

The previous prime is 13986846673. The next prime is 13986846749. The reversal of 13986846721 is 12764868931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13986846721 - 2¹⁷ = 13986715649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13986846521) 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, 1705375 + ... + 1713556.

It is an arithmetic number, because the mean of its divisors is an integer number (3497567436).

Almost surely, 2^13986846721 is an apocalyptic number.

It is an amenable number.

13986846721 is a deficient number, since it is larger than the sum of its proper divisors (3423023).

13986846721 is an equidigital number, since it uses as much as digits as its factorization.

13986846721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423022.

The product of its digits is 3483648, while the sum is 55.

The spelling of 13986846721 in words is "thirteen billion, nine hundred eighty-six million, eight hundred forty-six thousand, seven hundred twenty-one".