343809 has 6 divisors (see below), whose sum is σ = 496626. Its totient is φ = 229200.

The previous prime is 343801. The next prime is 343813. The reversal of 343809 is 908343.

It can be written as a sum of positive squares in only one way, i.e., 278784 + 65025 = 528^2 + 255^2 .

It is not a de Polignac number, because 343809 - 2³ = 343801 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343809.

It is not an unprimeable number, because it can be changed into a prime (343801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19092 + ... + 19109.

It is an arithmetic number, because the mean of its divisors is an integer number (82771).

2³⁴³⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

343809 is a deficient number, since it is larger than the sum of its proper divisors (152817).

343809 is a wasteful number, since it uses less digits than its factorization.

343809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38207 (or 38204 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 343809 is about 586.3522831882. The cubic root of 343809 is about 70.0549908025.

The spelling of 343809 in words is "three hundred forty-three thousand, eight hundred nine".