343831643 has 4 divisors (see below), whose sum is σ = 344269320. Its totient is φ = 343393968.

The previous prime is 343831637. The next prime is 343831661. The reversal of 343831643 is 346138343.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343831643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343831673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217658 + ... + 219231.

It is an arithmetic number, because the mean of its divisors is an integer number (86067330).

Almost surely, 2^343831643 is an apocalyptic number.

343831643 is a deficient number, since it is larger than the sum of its proper divisors (437677).

343831643 is an equidigital number, since it uses as much as digits as its factorization.

343831643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437676.

The product of its digits is 62208, while the sum is 35.

The square root of 343831643 is about 18542.6978349969. The cubic root of 343831643 is about 700.5652869155.

Adding to 343831643 its reverse (346138343), we get a palindrome (689969986).

The spelling of 343831643 in words is "three hundred forty-three million, eight hundred thirty-one thousand, six hundred forty-three".