384739 has 4 divisors (see below), whose sum is σ = 391320. Its totient is φ = 378160.

The previous prime is 384737. The next prime is 384751. The reversal of 384739 is 937483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937483 = 29 ⋅32327.

It is a cyclic number.

It is not a de Polignac number, because 384739 - 2¹ = 384737 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 384739.

It is not an unprimeable number, because it can be changed into a prime (384733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3202 + ... + 3319.

It is an arithmetic number, because the mean of its divisors is an integer number (97830).

2³⁸⁴⁷³⁹ is an apocalyptic number.

384739 is a deficient number, since it is larger than the sum of its proper divisors (6581).

384739 is an equidigital number, since it uses as much as digits as its factorization.

384739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6580.

The product of its digits is 18144, while the sum is 34.

The square root of 384739 is about 620.2733268487. The cubic root of 384739 is about 72.7314206441.

The spelling of 384739 in words is "three hundred eighty-four thousand, seven hundred thirty-nine".