11809479 has 12 divisors (see below), whose sum is σ = 17308088. Its totient is φ = 7157040.

The previous prime is 11809453. The next prime is 11809493. The reversal of 11809479 is 97490811.

It is a happy number.

11809479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11809479 - 2¹¹ = 11807431 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 (11809379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15904 + ... + 16629.

Almost surely, 2^11809479 is an apocalyptic number.

11809479 is a deficient number, since it is larger than the sum of its proper divisors (5498609).

11809479 is a wasteful number, since it uses less digits than its factorization.

11809479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32558 (or 32547 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 11809479 is about 3436.4922522828. The cubic root of 11809479 is about 227.7247563459.

The spelling of 11809479 in words is "eleven million, eight hundred nine thousand, four hundred seventy-nine".