13161791 has 4 divisors (see below), whose sum is σ = 13936032. Its totient is φ = 12387552.

The previous prime is 13161769. The next prime is 13161793. The reversal of 13161791 is 19716131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19716131 = 2503 ⋅7877.

It is a cyclic number.

It is not a de Polignac number, because 13161791 - 2¹⁸ = 12899647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 387095 + ... + 387128.

It is an arithmetic number, because the mean of its divisors is an integer number (3484008).

Almost surely, 2^13161791 is an apocalyptic number.

13161791 is a deficient number, since it is larger than the sum of its proper divisors (774241).

13161791 is an equidigital number, since it uses as much as digits as its factorization.

13161791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774240.

The product of its digits is 1134, while the sum is 29.

The square root of 13161791 is about 3627.9182736109. The cubic root of 13161791 is about 236.1048980674.

The spelling of 13161791 in words is "thirteen million, one hundred sixty-one thousand, seven hundred ninety-one".