84705868787 has 2 divisors, whose sum is σ = 84705868788. Its totient is φ = 84705868786.

The previous prime is 84705868777. The next prime is 84705868829. The reversal of 84705868787 is 78786850748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84705868787 - 2⁸ = 84705868531 is a prime.

It is not a weakly prime, because it can be changed into another prime (84705868717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42352934393 + 42352934394.

It is an arithmetic number, because the mean of its divisors is an integer number (42352934394).

Almost surely, 2^84705868787 is an apocalyptic number.

84705868787 is a deficient number, since it is larger than the sum of its proper divisors (1).

84705868787 is an equidigital number, since it uses as much as digits as its factorization.

84705868787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168591360, while the sum is 68.

The spelling of 84705868787 in words is "eighty-four billion, seven hundred five million, eight hundred sixty-eight thousand, seven hundred eighty-seven".