856343 has 2 divisors, whose sum is σ = 856344. Its totient is φ = 856342.

The previous prime is 856333. The next prime is 856351. The reversal of 856343 is 343658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856343 - 2⁶ = 856279 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428171 + 428172.

It is an arithmetic number, because the mean of its divisors is an integer number (428172).

2⁸⁵⁶³⁴³ is an apocalyptic number.

856343 is a deficient number, since it is larger than the sum of its proper divisors (1).

856343 is an equidigital number, since it uses as much as digits as its factorization.

856343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 856343 is about 925.3880267218. The cubic root of 856343 is about 94.9618683531.

The spelling of 856343 in words is "eight hundred fifty-six thousand, three hundred forty-three".