85807573 has 2 divisors, whose sum is σ = 85807574. Its totient is φ = 85807572.

The previous prime is 85807537. The next prime is 85807577. The reversal of 85807573 is 37570858.

Together with previous prime (85807537) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62362609 + 23444964 = 7897^2 + 4842^2 .

It is a cyclic number.

It is not a de Polignac number, because 85807573 - 2⁹ = 85807061 is a prime.

It is a zygodrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85807577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42903786 + 42903787.

It is an arithmetic number, because the mean of its divisors is an integer number (42903787).

Almost surely, 2^85807573 is an apocalyptic number.

It is an amenable number.

85807573 is a deficient number, since it is larger than the sum of its proper divisors (1).

85807573 is an equidigital number, since it uses as much as digits as its factorization.

85807573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 85807573 is about 9263.2377169109. The cubic root of 85807573 is about 441.0710357716.

The spelling of 85807573 in words is "eighty-five million, eight hundred seven thousand, five hundred seventy-three".