85823681 has 4 divisors (see below), whose sum is σ = 85858752. Its totient is φ = 85788612.

The previous prime is 85823671. The next prime is 85823687. The reversal of 85823681 is 18632858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85823681 - 2¹⁰ = 85822657 is a prime.

It is a super-2 number, since 2×85823681² = 14731408440779522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85823687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13565 + ... + 18858.

It is an arithmetic number, because the mean of its divisors is an integer number (21464688).

Almost surely, 2^85823681 is an apocalyptic number.

It is an amenable number.

85823681 is a deficient number, since it is larger than the sum of its proper divisors (35071).

85823681 is a wasteful number, since it uses less digits than its factorization.

85823681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35070.

The product of its digits is 92160, while the sum is 41.

The square root of 85823681 is about 9264.1071345273. The cubic root of 85823681 is about 441.0986336765.

The spelling of 85823681 in words is "eighty-five million, eight hundred twenty-three thousand, six hundred eighty-one".