50318309 has 2 divisors, whose sum is σ = 50318310. Its totient is φ = 50318308.

The previous prime is 50318291. The next prime is 50318311. The reversal of 50318309 is 90381305.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34692100 + 15626209 = 5890^2 + 3953^2 .

It is a cyclic number.

It is not a de Polignac number, because 50318309 - 2²⁴ = 33541093 is a prime.

It is a Sophie Germain prime.

Together with 50318311, it forms a pair of twin primes.

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 (50318329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25159154 + 25159155.

It is an arithmetic number, because the mean of its divisors is an integer number (25159155).

Almost surely, 2^50318309 is an apocalyptic number.

It is an amenable number.

50318309 is a deficient number, since it is larger than the sum of its proper divisors (1).

50318309 is an equidigital number, since it uses as much as digits as its factorization.

50318309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 50318309 is about 7093.5399484320. The cubic root of 50318309 is about 369.1832703244.

The spelling of 50318309 in words is "fifty million, three hundred eighteen thousand, three hundred nine".