850452809 has 2 divisors, whose sum is σ = 850452810. Its totient is φ = 850452808.

The previous prime is 850452797. The next prime is 850452817. The reversal of 850452809 is 908254058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814931209 + 35521600 = 28547^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 850452809 - 2²⁸ = 582017353 is a prime.

It is a super-3 number, since 3×850452809³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (850452859) 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, 425226404 + 425226405.

It is an arithmetic number, because the mean of its divisors is an integer number (425226405).

Almost surely, 2^850452809 is an apocalyptic number.

It is an amenable number.

850452809 is a deficient number, since it is larger than the sum of its proper divisors (1).

850452809 is an equidigital number, since it uses as much as digits as its factorization.

850452809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 850452809 is about 29162.5240505687. The cubic root of 850452809 is about 947.4364157896.

The spelling of 850452809 in words is "eight hundred fifty million, four hundred fifty-two thousand, eight hundred nine".