856674193 has 4 divisors (see below), whose sum is σ = 857579760. Its totient is φ = 855768628.

The previous prime is 856674191. The next prime is 856674197. The reversal of 856674193 is 391476658.

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 856674193 - 2¹ = 856674191 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 (856674191) 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, 451363 + ... + 453256.

It is an arithmetic number, because the mean of its divisors is an integer number (214394940).

Almost surely, 2^856674193 is an apocalyptic number.

It is an amenable number.

856674193 is a deficient number, since it is larger than the sum of its proper divisors (905567).

856674193 is an equidigital number, since it uses as much as digits as its factorization.

856674193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905566.

The product of its digits is 1088640, while the sum is 49.

The square root of 856674193 is about 29268.9971300692. The cubic root of 856674193 is about 949.7410902935.

The spelling of 856674193 in words is "eight hundred fifty-six million, six hundred seventy-four thousand, one hundred ninety-three".