856713 has 16 divisors (see below), whose sum is σ = 1342656. Its totient is φ = 479040.

The previous prime is 856711. The next prime is 856717. The reversal of 856713 is 317658.

It is not a de Polignac number, because 856713 - 2¹ = 856711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570 + ... + 1427.

It is an arithmetic number, because the mean of its divisors is an integer number (83916).

2⁸⁵⁶⁷¹³ is an apocalyptic number.

It is an amenable number.

856713 is a deficient number, since it is larger than the sum of its proper divisors (485943).

856713 is a wasteful number, since it uses less digits than its factorization.

856713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its digits is 5040, while the sum is 30.

The square root of 856713 is about 925.5879212695. The cubic root of 856713 is about 94.9755431041.

The spelling of 856713 in words is "eight hundred fifty-six thousand, seven hundred thirteen".