85500073 has 2 divisors, whose sum is σ = 85500074. Its totient is φ = 85500072.

The previous prime is 85500071. The next prime is 85500109. The reversal of 85500073 is 37000558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44129449 + 41370624 = 6643^2 + 6432^2 .

It is a cyclic number.

It is not a de Polignac number, because 85500073 - 2¹ = 85500071 is a prime.

Together with 85500071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85500071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42750036 + 42750037.

It is an arithmetic number, because the mean of its divisors is an integer number (42750037).

Almost surely, 2^85500073 is an apocalyptic number.

It is an amenable number.

85500073 is a deficient number, since it is larger than the sum of its proper divisors (1).

85500073 is an equidigital number, since it uses as much as digits as its factorization.

85500073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 85500073 is about 9246.6249518405. The cubic root of 85500073 is about 440.5435311243.

The spelling of 85500073 in words is "eighty-five million, five hundred thousand, seventy-three".