384809 has 4 divisors (see below), whose sum is σ = 389760. Its totient is φ = 379860.

The previous prime is 384779. The next prime is 384817. The reversal of 384809 is 908483.

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: 908483 = 29 ⋅31327.

It is a cyclic number.

It is not a de Polignac number, because 384809 - 2¹² = 380713 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 384809.

It is not an unprimeable number, because it can be changed into a prime (384889) 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, 2357 + ... + 2514.

It is an arithmetic number, because the mean of its divisors is an integer number (97440).

2³⁸⁴⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

384809 is a deficient number, since it is larger than the sum of its proper divisors (4951).

384809 is an equidigital number, since it uses as much as digits as its factorization.

384809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4950.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 384809 is about 620.3297510196. The cubic root of 384809 is about 72.7358313318.

The spelling of 384809 in words is "three hundred eighty-four thousand, eight hundred nine".