13946981 has 2 divisors, whose sum is σ = 13946982. Its totient is φ = 13946980.

The previous prime is 13946963. The next prime is 13946983. The reversal of 13946981 is 18964931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13942756 + 4225 = 3734^2 + 65^2 .

It is an emirp because it is prime and its reverse (18964931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13946981 - 2⁶ = 13946917 is a prime.

It is a super-2 number, since 2×13946981² = 389036558028722, which contains 22 as substring.

Together with 13946983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13946983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6973490 + 6973491.

It is an arithmetic number, because the mean of its divisors is an integer number (6973491).

Almost surely, 2^13946981 is an apocalyptic number.

It is an amenable number.

13946981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13946981 is an equidigital number, since it uses as much as digits as its factorization.

13946981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 13946981 is about 3734.5657043356. The cubic root of 13946981 is about 240.7095955100.

The spelling of 13946981 in words is "thirteen million, nine hundred forty-six thousand, nine hundred eighty-one".