857236043 has 2 divisors, whose sum is σ = 857236044. Its totient is φ = 857236042.

The previous prime is 857236021. The next prime is 857236049. The reversal of 857236043 is 340632758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 857236043 - 2⁶ = 857235979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857235988 and 857236006.

It is not a weakly prime, because it can be changed into another prime (857236049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428618021 + 428618022.

It is an arithmetic number, because the mean of its divisors is an integer number (428618022).

Almost surely, 2^857236043 is an apocalyptic number.

857236043 is a deficient number, since it is larger than the sum of its proper divisors (1).

857236043 is an equidigital number, since it uses as much as digits as its factorization.

857236043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 857236043 is about 29278.5935966877. The cubic root of 857236043 is about 949.9486742354.

The spelling of 857236043 in words is "eight hundred fifty-seven million, two hundred thirty-six thousand, forty-three".