11601609 has 16 divisors (see below), whose sum is σ = 16726080. Its totient is φ = 7128000.

The previous prime is 11601607. The next prime is 11601619. The reversal of 11601609 is 90610611.

11601609 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 11601609 - 2¹ = 11601607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11601607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642 + ... + 4859.

It is an arithmetic number, because the mean of its divisors is an integer number (1045380).

Almost surely, 2^11601609 is an apocalyptic number.

11601609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11601609 is a deficient number, since it is larger than the sum of its proper divisors (5124471).

11601609 is a wasteful number, since it uses less digits than its factorization.

11601609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 11601609 is about 3406.1134743282. The cubic root of 11601609 is about 226.3807050798.

The spelling of 11601609 in words is "eleven million, six hundred one thousand, six hundred nine".