343509 has 8 divisors (see below), whose sum is σ = 465120. Its totient is φ = 225456.

The previous prime is 343489. The next prime is 343517. The reversal of 343509 is 905343.

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

It is not a de Polignac number, because 343509 - 2⁷ = 343381 is a prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343509.

It is not an unprimeable number, because it can be changed into a prime (343529) 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, 654 + ... + 1055.

It is an arithmetic number, because the mean of its divisors is an integer number (58140).

2³⁴³⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

343509 is a deficient number, since it is larger than the sum of its proper divisors (121611).

343509 is a wasteful number, since it uses less digits than its factorization.

343509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 343509 is about 586.0964084517. The cubic root of 343509 is about 70.0346087366.

The spelling of 343509 in words is "three hundred forty-three thousand, five hundred nine".