847555823 has 2 divisors, whose sum is σ = 847555824. Its totient is φ = 847555822.

The previous prime is 847555733. The next prime is 847555831. The reversal of 847555823 is 328555748.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 847555823 - 2¹⁴ = 847539439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (847555883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423777911 + 423777912.

It is an arithmetic number, because the mean of its divisors is an integer number (423777912).

Almost surely, 2^847555823 is an apocalyptic number.

847555823 is a deficient number, since it is larger than the sum of its proper divisors (1).

847555823 is an equidigital number, since it uses as much as digits as its factorization.

847555823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344000, while the sum is 47.

The square root of 847555823 is about 29112.8120077742. The cubic root of 847555823 is about 946.3594081668.

The spelling of 847555823 in words is "eight hundred forty-seven million, five hundred fifty-five thousand, eight hundred twenty-three".