50809909 has 2 divisors, whose sum is σ = 50809910. Its totient is φ = 50809908.

The previous prime is 50809903. The next prime is 50809937. The reversal of 50809909 is 90990805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50722884 + 87025 = 7122^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 50809909 - 2³ = 50809901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50809901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25404954 + 25404955.

It is an arithmetic number, because the mean of its divisors is an integer number (25404955).

Almost surely, 2^50809909 is an apocalyptic number.

It is an amenable number.

50809909 is a deficient number, since it is larger than the sum of its proper divisors (1).

50809909 is an equidigital number, since it uses as much as digits as its factorization.

50809909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 50809909 is about 7128.1069717001. The cubic root of 50809909 is about 370.3816587729.

The spelling of 50809909 in words is "fifty million, eight hundred nine thousand, nine hundred nine".