85680073 has 2 divisors, whose sum is σ = 85680074. Its totient is φ = 85680072.

The previous prime is 85680059. The next prime is 85680131. The reversal of 85680073 is 37008658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79085449 + 6594624 = 8893^2 + 2568^2 .

It is a cyclic number.

It is not a de Polignac number, because 85680073 - 2⁵ = 85680041 is a prime.

It is not a weakly prime, because it can be changed into another prime (85680043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42840036 + 42840037.

It is an arithmetic number, because the mean of its divisors is an integer number (42840037).

Almost surely, 2^85680073 is an apocalyptic number.

It is an amenable number.

85680073 is a deficient number, since it is larger than the sum of its proper divisors (1).

85680073 is an equidigital number, since it uses as much as digits as its factorization.

85680073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 85680073 is about 9256.3531155634. The cubic root of 85680073 is about 440.8524675196.

The spelling of 85680073 in words is "eighty-five million, six hundred eighty thousand, seventy-three".