13491967 has 2 divisors, whose sum is σ = 13491968. Its totient is φ = 13491966.

The previous prime is 13491953. The next prime is 13491971. The reversal of 13491967 is 76919431.

It is a strong prime.

It is an emirp because it is prime and its reverse (76919431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13491967 - 2¹¹ = 13489919 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13491937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6745983 + 6745984.

It is an arithmetic number, because the mean of its divisors is an integer number (6745984).

Almost surely, 2^13491967 is an apocalyptic number.

13491967 is a deficient number, since it is larger than the sum of its proper divisors (1).

13491967 is an equidigital number, since it uses as much as digits as its factorization.

13491967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 40.

The square root of 13491967 is about 3673.1412986707. The cubic root of 13491967 is about 238.0629203037.

The spelling of 13491967 in words is "thirteen million, four hundred ninety-one thousand, nine hundred sixty-seven".