85890593 has 2 divisors, whose sum is σ = 85890594. Its totient is φ = 85890592.

The previous prime is 85890569. The next prime is 85890611. The reversal of 85890593 is 39509858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79423744 + 6466849 = 8912^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 85890593 - 2⁶ = 85890529 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 (85890503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42945296 + 42945297.

It is an arithmetic number, because the mean of its divisors is an integer number (42945297).

Almost surely, 2^85890593 is an apocalyptic number.

It is an amenable number.

85890593 is a deficient number, since it is larger than the sum of its proper divisors (1).

85890593 is an equidigital number, since it uses as much as digits as its factorization.

85890593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 85890593 is about 9267.7177881073. The cubic root of 85890593 is about 441.2132373399.

The spelling of 85890593 in words is "eighty-five million, eight hundred ninety thousand, five hundred ninety-three".