85859143 has 2 divisors, whose sum is σ = 85859144. Its totient is φ = 85859142.

The previous prime is 85859141. The next prime is 85859149. The reversal of 85859143 is 34195858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85859143 - 2¹ = 85859141 is a prime.

Together with 85859141, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 85859143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85859141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42929571 + 42929572.

It is an arithmetic number, because the mean of its divisors is an integer number (42929572).

Almost surely, 2^85859143 is an apocalyptic number.

85859143 is a deficient number, since it is larger than the sum of its proper divisors (1).

85859143 is an equidigital number, since it uses as much as digits as its factorization.

85859143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 43.

The square root of 85859143 is about 9266.0208827738. The cubic root of 85859143 is about 441.1593787048.

The spelling of 85859143 in words is "eighty-five million, eight hundred fifty-nine thousand, one hundred forty-three".