340209 has 12 divisors (see below), whose sum is σ = 497536. Its totient is φ = 223992.

The previous prime is 340201. The next prime is 340211. The reversal of 340209 is 902043.

It is not a de Polignac number, because 340209 - 2³ = 340201 is a prime.

It is a Duffinian number.

340209 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 340191 and 340200.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340209.

It is not an unprimeable number, because it can be changed into a prime (340201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 744 + ... + 1110.

2³⁴⁰²⁰⁹ is an apocalyptic number.

It is an amenable number.

340209 is a deficient number, since it is larger than the sum of its proper divisors (157327).

340209 is a wasteful number, since it uses less digits than its factorization.

340209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 340209 is about 583.2743779732. The cubic root of 340209 is about 69.8096187378.

The spelling of 340209 in words is "three hundred forty thousand, two hundred nine".