856279 has 2 divisors, whose sum is σ = 856280. Its totient is φ = 856278.

The previous prime is 856277. The next prime is 856301. The reversal of 856279 is 972658.

856279 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856279 - 2¹ = 856277 is a prime.

It is a super-4 number, since 4×856279⁴ (a number of 25 digits) contains 4444 as substring.

Together with 856277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428139 + 428140.

It is an arithmetic number, because the mean of its divisors is an integer number (428140).

2⁸⁵⁶²⁷⁹ is an apocalyptic number.

856279 is a deficient number, since it is larger than the sum of its proper divisors (1).

856279 is an equidigital number, since it uses as much as digits as its factorization.

856279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 37.

The square root of 856279 is about 925.3534459870. The cubic root of 856279 is about 94.9595025911.

The spelling of 856279 in words is "eight hundred fifty-six thousand, two hundred seventy-nine".