84821894827 has 2 divisors, whose sum is σ = 84821894828. Its totient is φ = 84821894826.

The previous prime is 84821894821. The next prime is 84821894851. The reversal of 84821894827 is 72849812848.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84821894827 is a prime.

It is not a weakly prime, because it can be changed into another prime (84821894821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42410947413 + 42410947414.

It is an arithmetic number, because the mean of its divisors is an integer number (42410947414).

Almost surely, 2^84821894827 is an apocalyptic number.

84821894827 is a deficient number, since it is larger than the sum of its proper divisors (1).

84821894827 is an equidigital number, since it uses as much as digits as its factorization.

84821894827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16515072, while the sum is 61.

The spelling of 84821894827 in words is "eighty-four billion, eight hundred twenty-one million, eight hundred ninety-four thousand, eight hundred twenty-seven".