855942673 has 4 divisors (see below), whose sum is σ = 906292260. Its totient is φ = 805593088.

The previous prime is 855942671. The next prime is 855942683. The reversal of 855942673 is 376249558.

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 678706704 + 177235969 = 26052^2 + 13313^2 .

It is a cyclic number.

It is not a de Polignac number, because 855942673 - 2¹ = 855942671 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855942671) 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, 25174768 + ... + 25174801.

It is an arithmetic number, because the mean of its divisors is an integer number (226573065).

Almost surely, 2^855942673 is an apocalyptic number.

It is an amenable number.

855942673 is a deficient number, since it is larger than the sum of its proper divisors (50349587).

855942673 is a wasteful number, since it uses less digits than its factorization.

855942673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50349586.

The product of its digits is 1814400, while the sum is 49.

The square root of 855942673 is about 29256.4979619913. The cubic root of 855942673 is about 949.4706831563.

The spelling of 855942673 in words is "eight hundred fifty-five million, nine hundred forty-two thousand, six hundred seventy-three".