50866861 has 2 divisors, whose sum is σ = 50866862. Its totient is φ = 50866860.

The previous prime is 50866853. The next prime is 50866883. The reversal of 50866861 is 16866805.

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., 46498761 + 4368100 = 6819^2 + 2090^2 .

It is a cyclic number.

It is not a de Polignac number, because 50866861 - 2³ = 50866853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50866811) 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, 25433430 + 25433431.

It is an arithmetic number, because the mean of its divisors is an integer number (25433431).

Almost surely, 2^50866861 is an apocalyptic number.

It is an amenable number.

50866861 is a deficient number, since it is larger than the sum of its proper divisors (1).

50866861 is an equidigital number, since it uses as much as digits as its factorization.

50866861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 50866861 is about 7132.1007424180. The cubic root of 50866861 is about 370.5199920248.

The spelling of 50866861 in words is "fifty million, eight hundred sixty-six thousand, eight hundred sixty-one".