343409 has 4 divisors (see below), whose sum is σ = 374640. Its totient is φ = 312180.

The previous prime is 343393. The next prime is 343411. The reversal of 343409 is 904343.

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.

It is not a de Polignac number, because 343409 - 2⁴ = 343393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15599 + ... + 15620.

It is an arithmetic number, because the mean of its divisors is an integer number (93660).

2³⁴³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

343409 is a deficient number, since it is larger than the sum of its proper divisors (31231).

343409 is a wasteful number, since it uses less digits than its factorization.

343409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31230.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 343409 is about 586.0110920452. The cubic root of 343409 is about 70.0278120776.

It can be divided in two parts, 34 and 3409, that added together give a palindrome (3443).

The spelling of 343409 in words is "three hundred forty-three thousand, four hundred nine".