11709589 has 4 divisors (see below), whose sum is σ = 11741356. Its totient is φ = 11677824.

The previous prime is 11709571. The next prime is 11709611. The reversal of 11709589 is 98590711.

It is a happy number.

11709589 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 9796900 + 1912689 = 3130^2 + 1383^2 .

It is a cyclic number.

It is not a de Polignac number, because 11709589 - 2⁹ = 11709077 is a prime.

It is a super-2 number, since 2×11709589² = 274228949097842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11709569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15324 + ... + 16069.

It is an arithmetic number, because the mean of its divisors is an integer number (2935339).

Almost surely, 2^11709589 is an apocalyptic number.

It is an amenable number.

11709589 is a deficient number, since it is larger than the sum of its proper divisors (31767).

11709589 is an equidigital number, since it uses as much as digits as its factorization.

11709589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31766.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 11709589 is about 3421.9276731106. The cubic root of 11709589 is about 227.0808706146.

The spelling of 11709589 in words is "eleven million, seven hundred nine thousand, five hundred eighty-nine".