509695994999 has 2 divisors, whose sum is σ = 509695995000. Its totient is φ = 509695994998.

The previous prime is 509695994911. The next prime is 509695995013. The reversal of 509695994999 is 999499596905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509695994999 - 2³⁶ = 440976518263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509695994909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254847997499 + 254847997500.

It is an arithmetic number, because the mean of its divisors is an integer number (254847997500).

Almost surely, 2^509695994999 is an apocalyptic number.

509695994999 is a deficient number, since it is larger than the sum of its proper divisors (1).

509695994999 is an equidigital number, since it uses as much as digits as its factorization.

509695994999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2869781400, while the sum is 83.

The spelling of 509695994999 in words is "five hundred nine billion, six hundred ninety-five million, nine hundred ninety-four thousand, nine hundred ninety-nine".