13667891 has 2 divisors, whose sum is σ = 13667892. Its totient is φ = 13667890.

The previous prime is 13667861. The next prime is 13667921. The reversal of 13667891 is 19876631.

It is a balanced prime because it is at equal distance from previous prime (13667861) and next prime (13667921).

It is a cyclic number.

It is not a de Polignac number, because 13667891 - 2⁶ = 13667827 is a prime.

It is a super-2 number, since 2×13667891² = 373622488775762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13667861) 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, 6833945 + 6833946.

It is an arithmetic number, because the mean of its divisors is an integer number (6833946).

Almost surely, 2^13667891 is an apocalyptic number.

13667891 is a deficient number, since it is larger than the sum of its proper divisors (1).

13667891 is an equidigital number, since it uses as much as digits as its factorization.

13667891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 13667891 is about 3697.0110900564. The cubic root of 13667891 is about 239.0931693263.

The spelling of 13667891 in words is "thirteen million, six hundred sixty-seven thousand, eight hundred ninety-one".