85020473 has 2 divisors, whose sum is σ = 85020474. Its totient is φ = 85020472.

The previous prime is 85020457. The next prime is 85020491. The reversal of 85020473 is 37402058.

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., 67947049 + 17073424 = 8243^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 85020473 - 2⁴ = 85020457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (85020433) 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, 42510236 + 42510237.

It is an arithmetic number, because the mean of its divisors is an integer number (42510237).

Almost surely, 2^85020473 is an apocalyptic number.

It is an amenable number.

85020473 is a deficient number, since it is larger than the sum of its proper divisors (1).

85020473 is an equidigital number, since it uses as much as digits as its factorization.

85020473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 85020473 is about 9220.6546947600. The cubic root of 85020473 is about 439.7182648895.

It can be divided in two parts, 850 and 20473, that multiplied together give a triangular number (17402050 = T₅₈₉₉).

The spelling of 85020473 in words is "eighty-five million, twenty thousand, four hundred seventy-three".