856671694 has 4 divisors (see below), whose sum is σ = 1285007544. Its totient is φ = 428335846.

The previous prime is 856671661. The next prime is 856671707. The reversal of 856671694 is 496176658.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 214167922 + ... + 214167925.

It is an arithmetic number, because the mean of its divisors is an integer number (321251886).

Almost surely, 2^856671694 is an apocalyptic number.

856671694 is a deficient number, since it is larger than the sum of its proper divisors (428335850).

856671694 is a wasteful number, since it uses less digits than its factorization.

856671694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428335849.

The product of its digits is 2177280, while the sum is 52.

The square root of 856671694 is about 29268.9544398156. The cubic root of 856671694 is about 949.7401667977.

The spelling of 856671694 in words is "eight hundred fifty-six million, six hundred seventy-one thousand, six hundred ninety-four".