13306991 has 2 divisors, whose sum is σ = 13306992. Its totient is φ = 13306990.

The previous prime is 13306981. The next prime is 13306999. The reversal of 13306991 is 19960331.

13306991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (19960331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13306991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13306999) 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, 6653495 + 6653496.

It is an arithmetic number, because the mean of its divisors is an integer number (6653496).

Almost surely, 2^13306991 is an apocalyptic number.

13306991 is a deficient number, since it is larger than the sum of its proper divisors (1).

13306991 is an equidigital number, since it uses as much as digits as its factorization.

13306991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 13306991 is about 3647.8748607922. The cubic root of 13306991 is about 236.9699558965.

The spelling of 13306991 in words is "thirteen million, three hundred six thousand, nine hundred ninety-one".