850905017 has 2 divisors, whose sum is σ = 850905018. Its totient is φ = 850905016.

The previous prime is 850905007. The next prime is 850905023. The reversal of 850905017 is 710509058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425555641 + 425349376 = 20629^2 + 20624^2 .

It is a cyclic number.

It is not a de Polignac number, because 850905017 - 2¹⁸ = 850642873 is a prime.

It is not a weakly prime, because it can be changed into another prime (850905007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425452508 + 425452509.

It is an arithmetic number, because the mean of its divisors is an integer number (425452509).

Almost surely, 2^850905017 is an apocalyptic number.

It is an amenable number.

850905017 is a deficient number, since it is larger than the sum of its proper divisors (1).

850905017 is an equidigital number, since it uses as much as digits as its factorization.

850905017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 850905017 is about 29170.2762585478. The cubic root of 850905017 is about 947.6043116083.

The spelling of 850905017 in words is "eight hundred fifty million, nine hundred five thousand, seventeen".