50955809 has 2 divisors, whose sum is σ = 50955810. Its totient is φ = 50955808.

The previous prime is 50955803. The next prime is 50955811. The reversal of 50955809 is 90855905.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 3621409 = 6880^2 + 1903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50955809 is a prime.

It is a Sophie Germain prime.

Together with 50955811, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (50955803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25477904 + 25477905.

It is an arithmetic number, because the mean of its divisors is an integer number (25477905).

Almost surely, 2^50955809 is an apocalyptic number.

It is an amenable number.

50955809 is a deficient number, since it is larger than the sum of its proper divisors (1).

50955809 is an equidigital number, since it uses as much as digits as its factorization.

50955809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 41.

The square root of 50955809 is about 7138.3337691649. Note that the first 3 decimals coincide. The cubic root of 50955809 is about 370.7358353737.

The spelling of 50955809 in words is "fifty million, nine hundred fifty-five thousand, eight hundred nine".