343540243 has 2 divisors, whose sum is σ = 343540244. Its totient is φ = 343540242.

The previous prime is 343540231. The next prime is 343540279. The reversal of 343540243 is 342045343.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 343540243 - 2⁹ = 343539731 is a prime.

It is not a weakly prime, because it can be changed into another prime (343540943) 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 as a sum of consecutive naturals, namely, 171770121 + 171770122.

It is an arithmetic number, because the mean of its divisors is an integer number (171770122).

Almost surely, 2^343540243 is an apocalyptic number.

343540243 is a deficient number, since it is larger than the sum of its proper divisors (1).

343540243 is an equidigital number, since it uses as much as digits as its factorization.

343540243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 28.

The square root of 343540243 is about 18534.8386289172. The cubic root of 343540243 is about 700.3673194632.

Adding to 343540243 its reverse (342045343), we get a palindrome (685585586).

The spelling of 343540243 in words is "three hundred forty-three million, five hundred forty thousand, two hundred forty-three".