85599559 has 2 divisors, whose sum is σ = 85599560. Its totient is φ = 85599558.

The previous prime is 85599557. The next prime is 85599593. The reversal of 85599559 is 95599558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85599559 - 2¹ = 85599557 is a prime.

Together with 85599557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85599551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42799779 + 42799780.

It is an arithmetic number, because the mean of its divisors is an integer number (42799780).

Almost surely, 2^85599559 is an apocalyptic number.

85599559 is a deficient number, since it is larger than the sum of its proper divisors (1).

85599559 is an equidigital number, since it uses as much as digits as its factorization.

85599559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3645000, while the sum is 55.

The square root of 85599559 is about 9252.0029723298. The cubic root of 85599559 is about 440.7143338075.

Subtracting from 85599559 its sum of digits (55), we obtain a square (85599504 = 9252²).

Subtracting 85599559 from its reverse (95599558), we obtain a palindrome (9999999).

The spelling of 85599559 in words is "eighty-five million, five hundred ninety-nine thousand, five hundred fifty-nine".