85866043 has 4 divisors (see below), whose sum is σ = 86830920. Its totient is φ = 84901168.

The previous prime is 85866041. The next prime is 85866091. The reversal of 85866043 is 34066858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85866043 - 2¹ = 85866041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85865987 and 85866005.

It is not an unprimeable number, because it can be changed into a prime (85866041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482305 + ... + 482482.

It is an arithmetic number, because the mean of its divisors is an integer number (21707730).

Almost surely, 2^85866043 is an apocalyptic number.

85866043 is a deficient number, since it is larger than the sum of its proper divisors (964877).

85866043 is an equidigital number, since it uses as much as digits as its factorization.

85866043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964876.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 85866043 is about 9266.3932033990. The cubic root of 85866043 is about 441.1711961928.

The spelling of 85866043 in words is "eighty-five million, eight hundred sixty-six thousand, forty-three".