856952543 has 4 divisors (see below), whose sum is σ = 857614560. Its totient is φ = 856290528.

The previous prime is 856952539. The next prime is 856952557. The reversal of 856952543 is 345259658.

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 856952543 - 2² = 856952539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856952513) 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, 329063 + ... + 331656.

It is an arithmetic number, because the mean of its divisors is an integer number (214403640).

Almost surely, 2^856952543 is an apocalyptic number.

856952543 is a deficient number, since it is larger than the sum of its proper divisors (662017).

856952543 is a wasteful number, since it uses less digits than its factorization.

856952543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662016.

The product of its digits is 1296000, while the sum is 47.

The square root of 856952543 is about 29273.7517752679. The cubic root of 856952543 is about 949.8439422326.

The spelling of 856952543 in words is "eight hundred fifty-six million, nine hundred fifty-two thousand, five hundred forty-three".