856339 has 4 divisors (see below), whose sum is σ = 934200. Its totient is φ = 778480.

The previous prime is 856333. The next prime is 856343. The reversal of 856339 is 933658.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856333) 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, 38914 + ... + 38935.

It is an arithmetic number, because the mean of its divisors is an integer number (233550).

2⁸⁵⁶³³⁹ is an apocalyptic number.

856339 is a deficient number, since it is larger than the sum of its proper divisors (77861).

856339 is a wasteful number, since it uses less digits than its factorization.

856339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77860.

The product of its digits is 19440, while the sum is 34.

The square root of 856339 is about 925.3858654637. The cubic root of 856339 is about 94.9617204964.

The spelling of 856339 in words is "eight hundred fifty-six thousand, three hundred thirty-nine".