384609 has 4 divisors (see below), whose sum is σ = 512816. Its totient is φ = 256404.

The previous prime is 384599. The next prime is 384611. The reversal of 384609 is 906483.

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 not a de Polignac number, because 384609 - 2⁵ = 384577 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64099 + ... + 64104.

It is an arithmetic number, because the mean of its divisors is an integer number (128204).

2³⁸⁴⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

384609 is a deficient number, since it is larger than the sum of its proper divisors (128207).

384609 is a wasteful number, since it uses less digits than its factorization.

384609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128206.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 384609 is about 620.1685254832. The cubic root of 384609 is about 72.7232279474.

The spelling of 384609 in words is "three hundred eighty-four thousand, six hundred nine".