85208143 has 2 divisors, whose sum is σ = 85208144. Its totient is φ = 85208142.

The previous prime is 85208129. The next prime is 85208173. The reversal of 85208143 is 34180258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85208143 - 2²⁵ = 51653711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85208173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42604071 + 42604072.

It is an arithmetic number, because the mean of its divisors is an integer number (42604072).

Almost surely, 2^85208143 is an apocalyptic number.

85208143 is a deficient number, since it is larger than the sum of its proper divisors (1).

85208143 is an equidigital number, since it uses as much as digits as its factorization.

85208143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 85208143 is about 9230.8256943786. The cubic root of 85208143 is about 440.0415645996.

The spelling of 85208143 in words is "eighty-five million, two hundred eight thousand, one hundred forty-three".