50643559 has 2 divisors, whose sum is σ = 50643560. Its totient is φ = 50643558.

The previous prime is 50643511. The next prime is 50643563. The reversal of 50643559 is 95534605.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 50643559 - 2¹⁹ = 50119271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50643259) 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, 25321779 + 25321780.

It is an arithmetic number, because the mean of its divisors is an integer number (25321780).

Almost surely, 2^50643559 is an apocalyptic number.

50643559 is a deficient number, since it is larger than the sum of its proper divisors (1).

50643559 is an equidigital number, since it uses as much as digits as its factorization.

50643559 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 37.

The square root of 50643559 is about 7116.4288094521. The cubic root of 50643559 is about 369.9770109895.

The spelling of 50643559 in words is "fifty million, six hundred forty-three thousand, five hundred fifty-nine".