11557609 has 8 divisors (see below), whose sum is σ = 13425728. Its totient is φ = 9743760.

The previous prime is 11557607. The next prime is 11557627. The reversal of 11557609 is 90675511.

11557609 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 11557609 - 2¹ = 11557607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11557607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13107 + ... + 13960.

It is an arithmetic number, because the mean of its divisors is an integer number (1678216).

Almost surely, 2^11557609 is an apocalyptic number.

It is an amenable number.

11557609 is a deficient number, since it is larger than the sum of its proper divisors (1868119).

11557609 is an equidigital number, since it uses as much as digits as its factorization.

11557609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27135.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 11557609 is about 3399.6483641694. The cubic root of 11557609 is about 226.0941537366.

The spelling of 11557609 in words is "eleven million, five hundred fifty-seven thousand, six hundred nine".