85808543 has 4 divisors (see below), whose sum is σ = 86610600. Its totient is φ = 85006488.

The previous prime is 85808533. The next prime is 85808581. The reversal of 85808543 is 34580858.

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 85808543 - 2²⁰ = 84759967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85808543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85808533) 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, 400868 + ... + 401081.

It is an arithmetic number, because the mean of its divisors is an integer number (21652650).

Almost surely, 2^85808543 is an apocalyptic number.

85808543 is a deficient number, since it is larger than the sum of its proper divisors (802057).

85808543 is a wasteful number, since it uses less digits than its factorization.

85808543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802056.

The product of its (nonzero) digits is 153600, while the sum is 41.

The square root of 85808543 is about 9263.2900742663. The cubic root of 85808543 is about 441.0726977744.

The spelling of 85808543 in words is "eighty-five million, eight hundred eight thousand, five hundred forty-three".