842847823 has 2 divisors, whose sum is σ = 842847824. Its totient is φ = 842847822.

The previous prime is 842847787. The next prime is 842847893. The reversal of 842847823 is 328748248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842847823 - 2¹³ = 842839631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842847893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421423911 + 421423912.

It is an arithmetic number, because the mean of its divisors is an integer number (421423912).

Almost surely, 2^842847823 is an apocalyptic number.

842847823 is a deficient number, since it is larger than the sum of its proper divisors (1).

842847823 is an equidigital number, since it uses as much as digits as its factorization.

842847823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688128, while the sum is 46.

The square root of 842847823 is about 29031.8415364923. The cubic root of 842847823 is about 944.6038756696.

The spelling of 842847823 in words is "eight hundred forty-two million, eight hundred forty-seven thousand, eight hundred twenty-three".