855288673 has 4 divisors (see below), whose sum is σ = 864106180. Its totient is φ = 846471168.

The previous prime is 855288647. The next prime is 855288691. The reversal of 855288673 is 376882558.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 175748049 + 679540624 = 13257^2 + 26068^2 .

It is a cyclic number.

It is not a de Polignac number, because 855288673 - 2¹⁷ = 855157601 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 855288673.

It is not an unprimeable number, because it can be changed into a prime (855288773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4408608 + ... + 4408801.

It is an arithmetic number, because the mean of its divisors is an integer number (216026545).

Almost surely, 2^855288673 is an apocalyptic number.

It is an amenable number.

855288673 is a deficient number, since it is larger than the sum of its proper divisors (8817507).

855288673 is an equidigital number, since it uses as much as digits as its factorization.

855288673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8817506.

The product of its digits is 3225600, while the sum is 52.

The square root of 855288673 is about 29245.3188219927. The cubic root of 855288673 is about 949.2288008963.

The spelling of 855288673 in words is "eight hundred fifty-five million, two hundred eighty-eight thousand, six hundred seventy-three".