85855823 has 4 divisors (see below), whose sum is σ = 85927248. Its totient is φ = 85784400.

The previous prime is 85855807. The next prime is 85855843. The reversal of 85855823 is 32855858.

It is a happy number.

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 85855823 - 2⁴ = 85855807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85855843) 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, 33878 + ... + 36323.

It is an arithmetic number, because the mean of its divisors is an integer number (21481812).

Almost surely, 2^85855823 is an apocalyptic number.

85855823 is a deficient number, since it is larger than the sum of its proper divisors (71425).

85855823 is a wasteful number, since it uses less digits than its factorization.

85855823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71424.

The product of its digits is 384000, while the sum is 44.

The square root of 85855823 is about 9265.8417318666. The cubic root of 85855823 is about 441.1536923835.

The spelling of 85855823 in words is "eighty-five million, eight hundred fifty-five thousand, eight hundred twenty-three".