50681209 has 2 divisors, whose sum is σ = 50681210. Its totient is φ = 50681208.

The previous prime is 50681203. The next prime is 50681251. The reversal of 50681209 is 90218605.

50681209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37699600 + 12981609 = 6140^2 + 3603^2 .

It is a cyclic number.

It is not a de Polignac number, because 50681209 - 2³ = 50681201 is a prime.

It is not a weakly prime, because it can be changed into another prime (50681201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25340604 + 25340605.

It is an arithmetic number, because the mean of its divisors is an integer number (25340605).

Almost surely, 2^50681209 is an apocalyptic number.

It is an amenable number.

50681209 is a deficient number, since it is larger than the sum of its proper divisors (1).

50681209 is an equidigital number, since it uses as much as digits as its factorization.

50681209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 50681209 is about 7119.0736054630. The cubic root of 50681209 is about 370.0686724252.

The spelling of 50681209 in words is "fifty million, six hundred eighty-one thousand, two hundred nine".