13967813 has 2 divisors, whose sum is σ = 13967814. Its totient is φ = 13967812.

The previous prime is 13967809. The next prime is 13967827. The reversal of 13967813 is 31876931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13890529 + 77284 = 3727^2 + 278^2 .

It is a cyclic number.

It is not a de Polignac number, because 13967813 - 2² = 13967809 is a prime.

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 (13907813) 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, 6983906 + 6983907.

It is an arithmetic number, because the mean of its divisors is an integer number (6983907).

Almost surely, 2^13967813 is an apocalyptic number.

It is an amenable number.

13967813 is a deficient number, since it is larger than the sum of its proper divisors (1).

13967813 is an equidigital number, since it uses as much as digits as its factorization.

13967813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 13967813 is about 3737.3537429577. The cubic root of 13967813 is about 240.8293817141.

The spelling of 13967813 in words is "thirteen million, nine hundred sixty-seven thousand, eight hundred thirteen".