11539009 has 4 divisors (see below), whose sum is σ = 11556400. Its totient is φ = 11521620.

The previous prime is 11538997. The next prime is 11539019. The reversal of 11539009 is 90093511.

11539009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90093511 = 1297 ⋅69463.

It is a cyclic number.

It is not a de Polignac number, because 11539009 - 2⁹ = 11538497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11539019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7659 + ... + 9040.

It is an arithmetic number, because the mean of its divisors is an integer number (2889100).

Almost surely, 2^11539009 is an apocalyptic number.

It is an amenable number.

11539009 is a deficient number, since it is larger than the sum of its proper divisors (17391).

11539009 is an equidigital number, since it uses as much as digits as its factorization.

11539009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17390.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 11539009 is about 3396.9116856345. The cubic root of 11539009 is about 225.9728019584.

The spelling of 11539009 in words is "eleven million, five hundred thirty-nine thousand, nine".