340312543 has 2 divisors, whose sum is σ = 340312544. Its totient is φ = 340312542.

The previous prime is 340312529. The next prime is 340312559. The reversal of 340312543 is 345213043.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 340312543 - 2⁹ = 340312031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340312243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170156271 + 170156272.

It is an arithmetic number, because the mean of its divisors is an integer number (170156272).

Almost surely, 2^340312543 is an apocalyptic number.

340312543 is a deficient number, since it is larger than the sum of its proper divisors (1).

340312543 is an equidigital number, since it uses as much as digits as its factorization.

340312543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 340312543 is about 18447.5619798390. The cubic root of 340312543 is about 698.1670023195.

Adding to 340312543 its reverse (345213043), we get a palindrome (685525586).

The spelling of 340312543 in words is "three hundred forty million, three hundred twelve thousand, five hundred forty-three".