240300509 has 2 divisors, whose sum is σ = 240300510. Its totient is φ = 240300508.

The previous prime is 240300497. The next prime is 240300517. The reversal of 240300509 is 905003042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224340484 + 15960025 = 14978^2 + 3995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240300509 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240300539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120150254 + 120150255.

It is an arithmetic number, because the mean of its divisors is an integer number (120150255).

Almost surely, 2^240300509 is an apocalyptic number.

It is an amenable number.

240300509 is a deficient number, since it is larger than the sum of its proper divisors (1).

240300509 is an equidigital number, since it uses as much as digits as its factorization.

240300509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 240300509 is about 15501.6292369544. The cubic root of 240300509 is about 621.7057683799.

The spelling of 240300509 in words is "two hundred forty million, three hundred thousand, five hundred nine".