823143227 has 2 divisors, whose sum is σ = 823143228. Its totient is φ = 823143226.

The previous prime is 823143203. The next prime is 823143239. The reversal of 823143227 is 722341328.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823143227 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 823143193 and 823143202.

It is not a weakly prime, because it can be changed into another prime (823143427) 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, 411571613 + 411571614.

It is an arithmetic number, because the mean of its divisors is an integer number (411571614).

Almost surely, 2^823143227 is an apocalyptic number.

823143227 is a deficient number, since it is larger than the sum of its proper divisors (1).

823143227 is an equidigital number, since it uses as much as digits as its factorization.

823143227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 823143227 is about 28690.4727566487. The cubic root of 823143227 is about 937.1845844287.

The spelling of 823143227 in words is "eight hundred twenty-three million, one hundred forty-three thousand, two hundred twenty-seven".