85387305823 has 4 divisors (see below), whose sum is σ = 85387972320. Its totient is φ = 85386639328.

The previous prime is 85387305797. The next prime is 85387305877. The reversal of 85387305823 is 32850378358.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85387305823 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 (85387305893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73690 + ... + 419767.

It is an arithmetic number, because the mean of its divisors is an integer number (21346993080).

Almost surely, 2^85387305823 is an apocalyptic number.

85387305823 is a deficient number, since it is larger than the sum of its proper divisors (666497).

85387305823 is a wasteful number, since it uses less digits than its factorization.

85387305823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666496.

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 85387305823 in words is "eighty-five billion, three hundred eighty-seven million, three hundred five thousand, eight hundred twenty-three".