11605091 has 4 divisors (see below), whose sum is σ = 11888184. Its totient is φ = 11322000.

The previous prime is 11605081. The next prime is 11605093. The reversal of 11605091 is 19050611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19050611 = 673 ⋅28307.

It is a cyclic number.

It is not a de Polignac number, because 11605091 - 2¹⁰ = 11604067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11605093) 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, 141485 + ... + 141566.

It is an arithmetic number, because the mean of its divisors is an integer number (2972046).

Almost surely, 2^11605091 is an apocalyptic number.

11605091 is a deficient number, since it is larger than the sum of its proper divisors (283093).

11605091 is an equidigital number, since it uses as much as digits as its factorization.

11605091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283092.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 11605091 is about 3406.6245757348. The cubic root of 11605091 is about 226.4033507539.

The spelling of 11605091 in words is "eleven million, six hundred five thousand, ninety-one".