365609 has 4 divisors (see below), whose sum is σ = 368016. Its totient is φ = 363204.

The previous prime is 365591. The next prime is 365611. The reversal of 365609 is 906563.

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: 906563 = 7 ⋅129509.

It is a cyclic number.

It is not a de Polignac number, because 365609 - 2¹⁶ = 300073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 365609.

It is not an unprimeable number, because it can be changed into a prime (365639) 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, 959 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (92004).

2³⁶⁵⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

365609 is a deficient number, since it is larger than the sum of its proper divisors (2407).

365609 is a wasteful number, since it uses less digits than its factorization.

365609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 365609 is about 604.6561006060. The cubic root of 365609 is about 71.5054195771.

The spelling of 365609 in words is "three hundred sixty-five thousand, six hundred nine".