50639689 has 2 divisors, whose sum is σ = 50639690. Its totient is φ = 50639688.

The previous prime is 50639663. The next prime is 50639747. The reversal of 50639689 is 98693605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45427600 + 5212089 = 6740^2 + 2283^2 .

It is a cyclic number.

It is not a de Polignac number, because 50639689 - 2⁹ = 50639177 is a prime.

It is not a weakly prime, because it can be changed into another prime (50639189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25319844 + 25319845.

It is an arithmetic number, because the mean of its divisors is an integer number (25319845).

Almost surely, 2^50639689 is an apocalyptic number.

It is an amenable number.

50639689 is a deficient number, since it is larger than the sum of its proper divisors (1).

50639689 is an equidigital number, since it uses as much as digits as its factorization.

50639689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 50639689 is about 7116.1568982141. The cubic root of 50639689 is about 369.9675866419.

The spelling of 50639689 in words is "fifty million, six hundred thirty-nine thousand, six hundred eighty-nine".