11809791 has 24 divisors (see below), whose sum is σ = 20127744. Its totient is φ = 6529680.

The previous prime is 11809769. The next prime is 11809793. The reversal of 11809791 is 19790811.

It is not a de Polignac number, because 11809791 - 2⁶ = 11809727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1071 + ... + 4976.

It is an arithmetic number, because the mean of its divisors is an integer number (838656).

Almost surely, 2^11809791 is an apocalyptic number.

11809791 is a deficient number, since it is larger than the sum of its proper divisors (8317953).

11809791 is a wasteful number, since it uses less digits than its factorization.

11809791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6091 (or 6088 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 11809791 is about 3436.5376471094. The cubic root of 11809791 is about 227.7267617829.

The spelling of 11809791 in words is "eleven million, eight hundred nine thousand, seven hundred ninety-one".