36644009 has 4 divisors (see below), whose sum is σ = 36661716. Its totient is φ = 36626304.

The previous prime is 36643967. The next prime is 36644011. The reversal of 36644009 is 90044663.

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 222784 + 36421225 = 472^2 + 6035^2 .

It is a cyclic number.

It is not a de Polignac number, because 36644009 - 2²⁴ = 19866793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36644039) 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, 5264 + ... + 10049.

It is an arithmetic number, because the mean of its divisors is an integer number (9165429).

Almost surely, 2^36644009 is an apocalyptic number.

It is an amenable number.

36644009 is a deficient number, since it is larger than the sum of its proper divisors (17707).

36644009 is a wasteful number, since it uses less digits than its factorization.

36644009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17706.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 36644009 is about 6053.4295238319. The cubic root of 36644009 is about 332.1500537407.

The spelling of 36644009 in words is "thirty-six million, six hundred forty-four thousand, nine".