35609 has 4 divisors (see below), whose sum is σ = 40704. Its totient is φ = 30516.

The previous prime is 35603. The next prime is 35617. The reversal of 35609 is 90653.

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: 90653 = 269 ⋅337.

It is a cyclic number.

It is not a de Polignac number, because 35609 - 2⁴ = 35593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (35603) 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, 2537 + ... + 2550.

It is an arithmetic number, because the mean of its divisors is an integer number (10176).

2³⁵⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

35609 is a deficient number, since it is larger than the sum of its proper divisors (5095).

35609 is an equidigital number, since it uses as much as digits as its factorization.

35609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 35609 is about 188.7034710863. The cubic root of 35609 is about 32.8992950764.

The spelling of 35609 in words is "thirty-five thousand, six hundred nine".