347839 has 4 divisors (see below), whose sum is σ = 354456. Its totient is φ = 341224.

The previous prime is 347821. The next prime is 347849. The reversal of 347839 is 938743.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938743 = 13 ⋅72211.

It is a cyclic number.

It is not a de Polignac number, because 347839 - 2¹¹ = 345791 is a prime.

It is a Duffinian number.

347839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (347849) 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, 3229 + ... + 3334.

It is an arithmetic number, because the mean of its divisors is an integer number (88614).

2³⁴⁷⁸³⁹ is an apocalyptic number.

347839 is a deficient number, since it is larger than the sum of its proper divisors (6617).

347839 is an equidigital number, since it uses as much as digits as its factorization.

347839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616.

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

The square root of 347839 is about 589.7787720832. The cubic root of 347839 is about 70.3276476665.

The spelling of 347839 in words is "three hundred forty-seven thousand, eight hundred thirty-nine".