857285713 has 4 divisors (see below), whose sum is σ = 858126388. Its totient is φ = 856445040.

The previous prime is 857285701. The next prime is 857285717. The reversal of 857285713 is 317582758.

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 703947024 + 153338689 = 26532^2 + 12383^2 .

It is a cyclic number.

It is not a de Polignac number, because 857285713 - 2¹³ = 857277521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857285717) 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, 418806 + ... + 420847.

It is an arithmetic number, because the mean of its divisors is an integer number (214531597).

Almost surely, 2^857285713 is an apocalyptic number.

It is an amenable number.

857285713 is a deficient number, since it is larger than the sum of its proper divisors (840675).

857285713 is a wasteful number, since it uses less digits than its factorization.

857285713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840674.

The product of its digits is 470400, while the sum is 46.

The square root of 857285713 is about 29279.4418150347. The cubic root of 857285713 is about 949.9670212005.

The spelling of 857285713 in words is "eight hundred fifty-seven million, two hundred eighty-five thousand, seven hundred thirteen".