85855199 has 2 divisors, whose sum is σ = 85855200. Its totient is φ = 85855198.

The previous prime is 85855193. The next prime is 85855241. The reversal of 85855199 is 99155858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85855199 - 2⁴ = 85855183 is a prime.

It is a super-3 number, since 3×85855199³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85855193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42927599 + 42927600.

It is an arithmetic number, because the mean of its divisors is an integer number (42927600).

Almost surely, 2^85855199 is an apocalyptic number.

85855199 is a deficient number, since it is larger than the sum of its proper divisors (1).

85855199 is an equidigital number, since it uses as much as digits as its factorization.

85855199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648000, while the sum is 50.

The square root of 85855199 is about 9265.8080597431. The cubic root of 85855199 is about 441.1526236128.

The spelling of 85855199 in words is "eighty-five million, eight hundred fifty-five thousand, one hundred ninety-nine".