516363509 has 2 divisors, whose sum is σ = 516363510. Its totient is φ = 516363508.

The previous prime is 516363461. The next prime is 516363539. The reversal of 516363509 is 905363615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334707025 + 181656484 = 18295^2 + 13478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-516363509 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 (516363539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258181754 + 258181755.

It is an arithmetic number, because the mean of its divisors is an integer number (258181755).

Almost surely, 2^516363509 is an apocalyptic number.

It is an amenable number.

516363509 is a deficient number, since it is larger than the sum of its proper divisors (1).

516363509 is an equidigital number, since it uses as much as digits as its factorization.

516363509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 516363509 is about 22723.6332702321. The cubic root of 516363509 is about 802.2662350986.

The spelling of 516363509 in words is "five hundred sixteen million, three hundred sixty-three thousand, five hundred nine".