11539609 has 9 divisors (see below), whose sum is σ = 11965653. Its totient is φ = 11128572.

The previous prime is 11539547. The next prime is 11539613. The reversal of 11539609 is 90693511.

The square root of 11539609 is 3397.

It is a perfect power (a square), and thus also a powerful number.

11539609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11539609 - 2²¹ = 9442457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11539639) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 146032 + ... + 146110.

It is an arithmetic number, because the mean of its divisors is an integer number (1329517).

Almost surely, 2^11539609 is an apocalyptic number.

11539609 is the 3397-th square number.

11539609 is the 1699-th centered octagonal number.

It is an amenable number.

11539609 is a deficient number, since it is larger than the sum of its proper divisors (426044).

11539609 is an frugal number, since it uses more digits than its factorization.

11539609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 34.

The cubic root of 11539609 is about 225.9767185666.

The spelling of 11539609 in words is "eleven million, five hundred thirty-nine thousand, six hundred nine".