13679971 has 2 divisors, whose sum is σ = 13679972. Its totient is φ = 13679970.

The previous prime is 13679969. The next prime is 13679987. The reversal of 13679971 is 17997631.

13679971 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (17997631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13679971 - 2¹ = 13679969 is a prime.

Together with 13679969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13670971) 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, 6839985 + 6839986.

It is an arithmetic number, because the mean of its divisors is an integer number (6839986).

Almost surely, 2^13679971 is an apocalyptic number.

13679971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13679971 is an equidigital number, since it uses as much as digits as its factorization.

13679971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 13679971 is about 3698.6444814283. The cubic root of 13679971 is about 239.1635872862.

The spelling of 13679971 in words is "thirteen million, six hundred seventy-nine thousand, nine hundred seventy-one".