856746443 has 4 divisors (see below), whose sum is σ = 979138800. Its totient is φ = 734354088.

The previous prime is 856746413. The next prime is 856746463. The reversal of 856746443 is 344647658.

856746443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 856746443 - 2¹² = 856742347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856746413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61196168 + ... + 61196181.

It is an arithmetic number, because the mean of its divisors is an integer number (244784700).

Almost surely, 2^856746443 is an apocalyptic number.

856746443 is a deficient number, since it is larger than the sum of its proper divisors (122392357).

856746443 is a wasteful number, since it uses less digits than its factorization.

856746443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122392356.

The product of its digits is 1935360, while the sum is 47.

The square root of 856746443 is about 29270.2313451739. The cubic root of 856746443 is about 949.7677892282.

The spelling of 856746443 in words is "eight hundred fifty-six million, seven hundred forty-six thousand, four hundred forty-three".