36609 has 4 divisors (see below), whose sum is σ = 48816. Its totient is φ = 24404.

The previous prime is 36607. The next prime is 36629. The reversal of 36609 is 90663.

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.

It is a cyclic number.

It is not a de Polignac number, because 36609 - 2¹ = 36607 is a prime.

It is a D-number.

36609 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 36609.

It is not an unprimeable number, because it can be changed into a prime (36607) 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, 6099 + ... + 6104.

It is an arithmetic number, because the mean of its divisors is an integer number (12204).

It is a Proth number, since it is equal to 143 ⋅ 2⁸ + 1 and 143 < 2⁸.

2³⁶⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

36609 is a deficient number, since it is larger than the sum of its proper divisors (12207).

36609 is a wasteful number, since it uses less digits than its factorization.

36609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12206.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 36609 is about 191.3347851281. The cubic root of 36609 is about 33.2044243390.

Subtracting from 36609 its sum of digits (24), we obtain a triangular number (36585 = T₂₇₀).

The spelling of 36609 in words is "thirty-six thousand, six hundred nine".