13980971 has 2 divisors, whose sum is σ = 13980972. Its totient is φ = 13980970.

The previous prime is 13980947. The next prime is 13980973. The reversal of 13980971 is 17908931.

It is a strong prime.

It is an emirp because it is prime and its reverse (17908931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13980971 is a prime.

Together with 13980973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13980973) 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, 6990485 + 6990486.

It is an arithmetic number, because the mean of its divisors is an integer number (6990486).

Almost surely, 2^13980971 is an apocalyptic number.

13980971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13980971 is an equidigital number, since it uses as much as digits as its factorization.

13980971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 13980971 is about 3739.1136650281. The cubic root of 13980971 is about 240.9049802464.

The spelling of 13980971 in words is "thirteen million, nine hundred eighty thousand, nine hundred seventy-one".