343009 has 4 divisors (see below), whose sum is σ = 363204. Its totient is φ = 322816.

The previous prime is 342989. The next prime is 343019. The reversal of 343009 is 900343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900343 = 269 ⋅3347.

It can be written as a sum of positive squares in 2 ways, for example, as 253009 + 90000 = 503^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 343009 - 2⁹ = 342497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343019) 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, 10072 + ... + 10105.

It is an arithmetic number, because the mean of its divisors is an integer number (90801).

343009 is a Friedman number, since it can be written as (40+30)^3+9, using all its digits and the basic arithmetic operations.

2³⁴³⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

343009 is a deficient number, since it is larger than the sum of its proper divisors (20195).

343009 is a wasteful number, since it uses less digits than its factorization.

343009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20194.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 343009 is about 585.6697021359. The cubic root of 343009 is about 70.0006122395. Note that the first 3 decimals are identical.

The spelling of 343009 in words is "three hundred forty-three thousand, nine".