85855843 has 2 divisors, whose sum is σ = 85855844. Its totient is φ = 85855842.

The previous prime is 85855807. The next prime is 85855883. The reversal of 85855843 is 34855858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85855843 - 2⁹ = 85855331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85855793 and 85855802.

It is not a weakly prime, because it can be changed into another prime (85855883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42927921 + 42927922.

It is an arithmetic number, because the mean of its divisors is an integer number (42927922).

Almost surely, 2^85855843 is an apocalyptic number.

85855843 is a deficient number, since it is larger than the sum of its proper divisors (1).

85855843 is an equidigital number, since it uses as much as digits as its factorization.

85855843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768000, while the sum is 46.

The square root of 85855843 is about 9265.8428110993. The cubic root of 85855843 is about 441.1537266389.

The spelling of 85855843 in words is "eighty-five million, eight hundred fifty-five thousand, eight hundred forty-three".