85593509 has 2 divisors, whose sum is σ = 85593510. Its totient is φ = 85593508.

The previous prime is 85593503. The next prime is 85593539. The reversal of 85593509 is 90539558.

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., 62457409 + 23136100 = 7903^2 + 4810^2 .

It is a cyclic number.

It is not a de Polignac number, because 85593509 - 2⁸ = 85593253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85593509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85593503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42796754 + 42796755.

It is an arithmetic number, because the mean of its divisors is an integer number (42796755).

Almost surely, 2^85593509 is an apocalyptic number.

It is an amenable number.

85593509 is a deficient number, since it is larger than the sum of its proper divisors (1).

85593509 is an equidigital number, since it uses as much as digits as its factorization.

85593509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 85593509 is about 9251.6760103238. The cubic root of 85593509 is about 440.7039506367.

The spelling of 85593509 in words is "eighty-five million, five hundred ninety-three thousand, five hundred nine".