13165091 has 4 divisors (see below), whose sum is σ = 13196784. Its totient is φ = 13133400.

The previous prime is 13165079. The next prime is 13165099. The reversal of 13165091 is 19056131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13165091 - 2⁶ = 13165027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13165091.

It is not an unprimeable number, because it can be changed into a prime (13165099) 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, 15215 + ... + 16056.

It is an arithmetic number, because the mean of its divisors is an integer number (3299196).

Almost surely, 2^13165091 is an apocalyptic number.

13165091 is a deficient number, since it is larger than the sum of its proper divisors (31693).

13165091 is an equidigital number, since it uses as much as digits as its factorization.

13165091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31692.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 13165091 is about 3628.3730513827. The cubic root of 13165091 is about 236.1246289449.

The spelling of 13165091 in words is "thirteen million, one hundred sixty-five thousand, ninety-one".