856243043 has 2 divisors, whose sum is σ = 856243044. Its totient is φ = 856243042.

The previous prime is 856243027. The next prime is 856243109. The reversal of 856243043 is 340342658.

856243043 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 856243043 - 2⁴ = 856243027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856242994 and 856243012.

It is not a weakly prime, because it can be changed into another prime (856243643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428121521 + 428121522.

It is an arithmetic number, because the mean of its divisors is an integer number (428121522).

Almost surely, 2^856243043 is an apocalyptic number.

856243043 is a deficient number, since it is larger than the sum of its proper divisors (1).

856243043 is an equidigital number, since it uses as much as digits as its factorization.

856243043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 856243043 is about 29261.6309012331. The cubic root of 856243043 is about 949.5817338783.

The spelling of 856243043 in words is "eight hundred fifty-six million, two hundred forty-three thousand, forty-three".