856305273 has 16 divisors (see below), whose sum is σ = 1157345280. Its totient is φ = 563090064.

The previous prime is 856305269. The next prime is 856305287. The reversal of 856305273 is 372503658.

856305273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 856305273 - 2² = 856305269 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856305773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176640 + ... + 181422.

It is an arithmetic number, because the mean of its divisors is an integer number (72334080).

Almost surely, 2^856305273 is an apocalyptic number.

856305273 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

856305273 is a deficient number, since it is larger than the sum of its proper divisors (301040007).

856305273 is a wasteful number, since it uses less digits than its factorization.

856305273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5588.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 856305273 is about 29262.6942197741. The cubic root of 856305273 is about 949.6047378763.

The spelling of 856305273 in words is "eight hundred fifty-six million, three hundred five thousand, two hundred seventy-three".