340509 has 8 divisors (see below), whose sum is σ = 488992. Its totient is φ = 209520.

The previous prime is 340481. The next prime is 340519. The reversal of 340509 is 905043.

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

It is not a de Polignac number, because 340509 - 2⁵ = 340477 is a prime.

It is a Duffinian number.

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 340509.

It is not an unprimeable number, because it can be changed into a prime (340519) 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, 4327 + ... + 4404.

It is an arithmetic number, because the mean of its divisors is an integer number (61124).

2³⁴⁰⁵⁰⁹ is an apocalyptic number.

340509 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

340509 is a deficient number, since it is larger than the sum of its proper divisors (148483).

340509 is a wasteful number, since it uses less digits than its factorization.

340509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 340509 is about 583.5314901528. The cubic root of 340509 is about 69.8301323365.

The spelling of 340509 in words is "three hundred forty thousand, five hundred nine".