343905 has 16 divisors (see below), whose sum is σ = 558144. Its totient is φ = 180800.

The previous prime is 343901. The next prime is 343913. The reversal of 343905 is 509343.

It is not a de Polignac number, because 343905 - 2² = 343901 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343905.

It is not an unprimeable number, because it can be changed into a prime (343901) 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 15 ways as a sum of consecutive naturals, for example, 1402 + ... + 1628.

It is an arithmetic number, because the mean of its divisors is an integer number (34884).

2³⁴³⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

343905 is a deficient number, since it is larger than the sum of its proper divisors (214239).

343905 is a wasteful number, since it uses less digits than its factorization.

343905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 343905 is about 586.4341395246. The cubic root of 343905 is about 70.0615105593.

The spelling of 343905 in words is "three hundred forty-three thousand, nine hundred five".