13116891 has 16 divisors (see below), whose sum is σ = 17910560. Its totient is φ = 8536320.

The previous prime is 13116853. The next prime is 13116919. The reversal of 13116891 is 19861131.

13116891 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13116891 - 2¹³ = 13108699 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13116841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41751 + ... + 42063.

It is an arithmetic number, because the mean of its divisors is an integer number (1119410).

Almost surely, 2^13116891 is an apocalyptic number.

13116891 is a deficient number, since it is larger than the sum of its proper divisors (4793669).

13116891 is a wasteful number, since it uses less digits than its factorization.

13116891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606.

The product of its digits is 1296, while the sum is 30.

The square root of 13116891 is about 3621.7248653093. The cubic root of 13116891 is about 235.8361102391.

The spelling of 13116891 in words is "thirteen million, one hundred sixteen thousand, eight hundred ninety-one".