50478809 has 2 divisors, whose sum is σ = 50478810. Its totient is φ = 50478808.

The previous prime is 50478793. The next prime is 50478811. The reversal of 50478809 is 90887405.

50478809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 635209 = 7060^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 50478809 - 2⁴ = 50478793 is a prime.

It is a super-2 number, since 2×50478809² = 5096220316116962, which contains 22 as substring.

Together with 50478811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50478829) 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, 25239404 + 25239405.

It is an arithmetic number, because the mean of its divisors is an integer number (25239405).

Almost surely, 2^50478809 is an apocalyptic number.

It is an amenable number.

50478809 is a deficient number, since it is larger than the sum of its proper divisors (1).

50478809 is an equidigital number, since it uses as much as digits as its factorization.

50478809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 50478809 is about 7104.8440517720. The cubic root of 50478809 is about 369.5753809156.

The spelling of 50478809 in words is "fifty million, four hundred seventy-eight thousand, eight hundred nine".