347409 has 10 divisors (see below), whose sum is σ = 519090. Its totient is φ = 231552.

The previous prime is 347401. The next prime is 347411. The reversal of 347409 is 904743.

347409 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 342225 + 5184 = 585^2 + 72^2 .

It is not a de Polignac number, because 347409 - 2³ = 347401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (347401) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2064 + ... + 2225.

It is an arithmetic number, because the mean of its divisors is an integer number (51909).

2³⁴⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

347409 is a deficient number, since it is larger than the sum of its proper divisors (171681).

347409 is an equidigital number, since it uses as much as digits as its factorization.

347409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4301 (or 4292 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 347409 is about 589.4141158812. The cubic root of 347409 is about 70.2986559410.

The spelling of 347409 in words is "three hundred forty-seven thousand, four hundred nine".