856118843 has 2 divisors, whose sum is σ = 856118844. Its totient is φ = 856118842.

The previous prime is 856118821. The next prime is 856118881. The reversal of 856118843 is 348811658.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856118843 - 2⁶ = 856118779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856118794 and 856118803.

It is not a weakly prime, because it can be changed into another prime (856118243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428059421 + 428059422.

It is an arithmetic number, because the mean of its divisors is an integer number (428059422).

Almost surely, 2^856118843 is an apocalyptic number.

856118843 is a deficient number, since it is larger than the sum of its proper divisors (1).

856118843 is an equidigital number, since it uses as much as digits as its factorization.

856118843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 44.

The square root of 856118843 is about 29259.5085912255. The cubic root of 856118843 is about 949.5358186618.

The spelling of 856118843 in words is "eight hundred fifty-six million, one hundred eighteen thousand, eight hundred forty-three".