86856043 has 4 divisors (see below), whose sum is σ = 91965240. Its totient is φ = 81746848.

The previous prime is 86856037. The next prime is 86856059. The reversal of 86856043 is 34065868.

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 86856043 - 2¹³ = 86847851 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 86855987 and 86856005.

It is not an unprimeable number, because it can be changed into a prime (86856023) 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, 2554573 + ... + 2554606.

It is an arithmetic number, because the mean of its divisors is an integer number (22991310).

Almost surely, 2^86856043 is an apocalyptic number.

86856043 is a deficient number, since it is larger than the sum of its proper divisors (5109197).

86856043 is a wasteful number, since it uses less digits than its factorization.

86856043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109196.

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

The square root of 86856043 is about 9319.6589529875. The cubic root of 86856043 is about 442.8602286540.

The spelling of 86856043 in words is "eighty-six million, eight hundred fifty-six thousand, forty-three".