343640543 has 2 divisors, whose sum is σ = 343640544. Its totient is φ = 343640542.

The previous prime is 343640527. The next prime is 343640569. The reversal of 343640543 is 345046343.

It is a weak prime.

It is an emirp because it is prime and its reverse (345046343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343640543 - 2⁴ = 343640527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343640243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171820271 + 171820272.

It is an arithmetic number, because the mean of its divisors is an integer number (171820272).

Almost surely, 2^343640543 is an apocalyptic number.

343640543 is a deficient number, since it is larger than the sum of its proper divisors (1).

343640543 is an equidigital number, since it uses as much as digits as its factorization.

343640543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 32.

The square root of 343640543 is about 18537.5441469468. The cubic root of 343640543 is about 700.4354725721.

Adding to 343640543 its reverse (345046343), we get a palindrome (688686886).

The spelling of 343640543 in words is "three hundred forty-three million, six hundred forty thousand, five hundred forty-three".