13091943 has 4 divisors (see below), whose sum is σ = 17455928. Its totient is φ = 8727960.

The previous prime is 13091941. The next prime is 13091971. The reversal of 13091943 is 34919031.

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

It is not a de Polignac number, because 13091943 - 2¹ = 13091941 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 13091943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13091941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2181988 + ... + 2181993.

It is an arithmetic number, because the mean of its divisors is an integer number (4363982).

Almost surely, 2^13091943 is an apocalyptic number.

13091943 is a deficient number, since it is larger than the sum of its proper divisors (4363985).

13091943 is an equidigital number, since it uses as much as digits as its factorization.

13091943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363984.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 13091943 is about 3618.2790108006. The cubic root of 13091943 is about 235.6864972095.

The spelling of 13091943 in words is "thirteen million, ninety-one thousand, nine hundred forty-three".