13193891 has 4 divisors (see below), whose sum is σ = 13225800. Its totient is φ = 13161984.

The previous prime is 13193863. The next prime is 13193893. The reversal of 13193891 is 19839131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19839131 = 13 ⋅1526087.

It is a cyclic number.

It is not a de Polignac number, because 13193891 - 2⁶ = 13193827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13193893) 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 in 3 ways as a sum of consecutive naturals, for example, 15326 + ... + 16163.

It is an arithmetic number, because the mean of its divisors is an integer number (3306450).

Almost surely, 2^13193891 is an apocalyptic number.

13193891 is a deficient number, since it is larger than the sum of its proper divisors (31909).

13193891 is an equidigital number, since it uses as much as digits as its factorization.

13193891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31908.

The product of its digits is 5832, while the sum is 35.

The square root of 13193891 is about 3632.3396041670. The cubic root of 13193891 is about 236.2966859017.

The spelling of 13193891 in words is "thirteen million, one hundred ninety-three thousand, eight hundred ninety-one".