850221061 has 2 divisors, whose sum is σ = 850221062. Its totient is φ = 850221060.

The previous prime is 850220981. The next prime is 850221077. The reversal of 850221061 is 160122058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 758176225 + 92044836 = 27535^2 + 9594^2 .

It is a cyclic number.

It is not a de Polignac number, because 850221061 - 2⁹ = 850220549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (850224061) 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, 425110530 + 425110531.

It is an arithmetic number, because the mean of its divisors is an integer number (425110531).

Almost surely, 2^850221061 is an apocalyptic number.

It is an amenable number.

850221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

850221061 is an equidigital number, since it uses as much as digits as its factorization.

850221061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 850221061 is about 29158.5503926378. The cubic root of 850221061 is about 947.3503493087.

The spelling of 850221061 in words is "eight hundred fifty million, two hundred twenty-one thousand, sixty-one".