8219863843 has 2 divisors, whose sum is σ = 8219863844. Its totient is φ = 8219863842.

The previous prime is 8219863837. The next prime is 8219863853. The reversal of 8219863843 is 3483689128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8219863843 - 2¹⁷ = 8219732771 is a prime.

It is not a weakly prime, because it can be changed into another prime (8219863823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109931921 + 4109931922.

It is an arithmetic number, because the mean of its divisors is an integer number (4109931922).

Almost surely, 2^8219863843 is an apocalyptic number.

8219863843 is a deficient number, since it is larger than the sum of its proper divisors (1).

8219863843 is an equidigital number, since it uses as much as digits as its factorization.

8219863843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 52.

The square root of 8219863843 is about 90663.4647639279. The cubic root of 8219863843 is about 2018.1566560375.

The spelling of 8219863843 in words is "eight billion, two hundred nineteen million, eight hundred sixty-three thousand, eight hundred forty-three".