14447981 has 2 divisors, whose sum is σ = 14447982. Its totient is φ = 14447980.

The previous prime is 14447971. The next prime is 14447987. The reversal of 14447981 is 18974441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14182756 + 265225 = 3766^2 + 515^2 .

It is an emirp because it is prime and its reverse (18974441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14447981 is a prime.

It is a super-2 number, since 2×14447981² = 417488309952722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14447987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7223990 + 7223991.

It is an arithmetic number, because the mean of its divisors is an integer number (7223991).

Almost surely, 2^14447981 is an apocalyptic number.

It is an amenable number.

14447981 is a deficient number, since it is larger than the sum of its proper divisors (1).

14447981 is an equidigital number, since it uses as much as digits as its factorization.

14447981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 14447981 is about 3801.0499865169. The cubic root of 14447981 is about 243.5579933463.

The spelling of 14447981 in words is "fourteen million, four hundred forty-seven thousand, nine hundred eighty-one".