50678809 has 2 divisors, whose sum is σ = 50678810. Its totient is φ = 50678808.

The previous prime is 50678807. The next prime is 50678827. The reversal of 50678809 is 90887605.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27667600 + 23011209 = 5260^2 + 4797^2 .

It is a cyclic number.

It is not a de Polignac number, because 50678809 - 2¹ = 50678807 is a prime.

Together with 50678807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (50678801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25339404 + 25339405.

It is an arithmetic number, because the mean of its divisors is an integer number (25339405).

Almost surely, 2^50678809 is an apocalyptic number.

It is an amenable number.

50678809 is a deficient number, since it is larger than the sum of its proper divisors (1).

50678809 is an equidigital number, since it uses as much as digits as its factorization.

50678809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 50678809 is about 7118.9050422098. The cubic root of 50678809 is about 370.0628308200.

The spelling of 50678809 in words is "fifty million, six hundred seventy-eight thousand, eight hundred nine".