13981349 has 2 divisors, whose sum is σ = 13981350. Its totient is φ = 13981348.

The previous prime is 13981339. The next prime is 13981351. The reversal of 13981349 is 94318931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12040900 + 1940449 = 3470^2 + 1393^2 .

It is a cyclic number.

It is not a de Polignac number, because 13981349 - 2⁴ = 13981333 is a prime.

Together with 13981351, 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 (13981339) 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, 6990674 + 6990675.

It is an arithmetic number, because the mean of its divisors is an integer number (6990675).

Almost surely, 2^13981349 is an apocalyptic number.

It is an amenable number.

13981349 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981349 is an equidigital number, since it uses as much as digits as its factorization.

13981349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 13981349 is about 3739.1642114248. The cubic root of 13981349 is about 240.9071513226.

The spelling of 13981349 in words is "thirteen million, nine hundred eighty-one thousand, three hundred forty-nine".