84821894863 has 2 divisors, whose sum is σ = 84821894864. Its totient is φ = 84821894862.

The previous prime is 84821894851. The next prime is 84821894869. The reversal of 84821894863 is 36849812848.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84821894863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84821894869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42410947431 + 42410947432.

It is an arithmetic number, because the mean of its divisors is an integer number (42410947432).

Almost surely, 2^84821894863 is an apocalyptic number.

84821894863 is a deficient number, since it is larger than the sum of its proper divisors (1).

84821894863 is an equidigital number, since it uses as much as digits as its factorization.

84821894863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21233664, while the sum is 61.

The spelling of 84821894863 in words is "eighty-four billion, eight hundred twenty-one million, eight hundred ninety-four thousand, eight hundred sixty-three".