509305343 has 2 divisors, whose sum is σ = 509305344. Its totient is φ = 509305342.

The previous prime is 509305319. The next prime is 509305369. The reversal of 509305343 is 343503905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509305343 - 2²⁰ = 508256767 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 (509305243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254652671 + 254652672.

It is an arithmetic number, because the mean of its divisors is an integer number (254652672).

Almost surely, 2^509305343 is an apocalyptic number.

509305343 is a deficient number, since it is larger than the sum of its proper divisors (1).

509305343 is an equidigital number, since it uses as much as digits as its factorization.

509305343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 32.

The square root of 509305343 is about 22567.7943760572. The cubic root of 509305343 is about 798.5940634379.

The spelling of 509305343 in words is "five hundred nine million, three hundred five thousand, three hundred forty-three".