347809 has 8 divisors (see below), whose sum is σ = 433728. Its totient is φ = 270960.

The previous prime is 347801. The next prime is 347813. The reversal of 347809 is 908743.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 347809 - 2³ = 347801 is a prime.

It is a super-2 number, since 2×347809² = 241942200962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (347801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2182 + ... + 2335.

It is an arithmetic number, because the mean of its divisors is an integer number (54216).

2³⁴⁷⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

347809 is a deficient number, since it is larger than the sum of its proper divisors (85919).

347809 is a wasteful number, since it uses less digits than its factorization.

347809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 347809 is about 589.7533382695. The cubic root of 347809 is about 70.3256257636.

It can be divided in two parts, 347 and 809, that added together give a square (1156 = 34²).

The spelling of 347809 in words is "three hundred forty-seven thousand, eight hundred nine".