11809239 has 8 divisors (see below), whose sum is σ = 16956912. Its totient is φ = 7267200.

The previous prime is 11809211. The next prime is 11809249. The reversal of 11809239 is 93290811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11809239 - 2⁷ = 11809111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11809249) 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 7 ways as a sum of consecutive naturals, for example, 151362 + ... + 151439.

It is an arithmetic number, because the mean of its divisors is an integer number (2119614).

Almost surely, 2^11809239 is an apocalyptic number.

11809239 is a deficient number, since it is larger than the sum of its proper divisors (5147673).

11809239 is a wasteful number, since it uses less digits than its factorization.

11809239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302817.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 11809239 is about 3436.4573327775. The cubic root of 11809239 is about 227.7232136780.

The spelling of 11809239 in words is "eleven million, eight hundred nine thousand, two hundred thirty-nine".