343809809 has 16 divisors (see below), whose sum is σ = 416572416. Its totient is φ = 277473600.

The previous prime is 343809803. The next prime is 343809833. The reversal of 343809809 is 908908343.

It is a cyclic number.

It is not a de Polignac number, because 343809809 - 2²⁸ = 75374353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 343809809.

It is not an unprimeable number, because it can be changed into a prime (343809803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13382 + ... + 29439.

It is an arithmetic number, because the mean of its divisors is an integer number (26035776).

Almost surely, 2^343809809 is an apocalyptic number.

It is an amenable number.

343809809 is a deficient number, since it is larger than the sum of its proper divisors (72762607).

343809809 is a wasteful number, since it uses less digits than its factorization.

343809809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42896.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 343809809 is about 18542.1090763699. The cubic root of 343809809 is about 700.5504575006.

The spelling of 343809809 in words is "three hundred forty-three million, eight hundred nine thousand, eight hundred nine".