85599817 has 2 divisors, whose sum is σ = 85599818. Its totient is φ = 85599816.

The previous prime is 85599797. The next prime is 85599821. The reversal of 85599817 is 71899558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79762761 + 5837056 = 8931^2 + 2416^2 .

It is a cyclic number.

It is not a de Polignac number, because 85599817 - 2¹¹ = 85597769 is a prime.

It is not a weakly prime, because it can be changed into another prime (85599847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42799908 + 42799909.

It is an arithmetic number, because the mean of its divisors is an integer number (42799909).

Almost surely, 2^85599817 is an apocalyptic number.

It is an amenable number.

85599817 is a deficient number, since it is larger than the sum of its proper divisors (1).

85599817 is an equidigital number, since it uses as much as digits as its factorization.

85599817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 52.

The square root of 85599817 is about 9252.0169152461. The cubic root of 85599817 is about 440.7147765831.

The spelling of 85599817 in words is "eighty-five million, five hundred ninety-nine thousand, eight hundred seventeen".