84747861838589 has 2 divisors, whose sum is σ = 84747861838590. Its totient is φ = 84747861838588.

The previous prime is 84747861838579. The next prime is 84747861838663. The reversal of 84747861838589 is 98583816874748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55178823780025 + 29569038058564 = 7428245^2 + 5437742^2 .

It is a cyclic number.

It is not a de Polignac number, because 84747861838589 - 2¹⁶ = 84747861773053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84747861838589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84747861838579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42373930919294 + 42373930919295.

It is an arithmetic number, because the mean of its divisors is an integer number (42373930919295).

Almost surely, 2^{84747861838589} is an apocalyptic number.

It is an amenable number.

84747861838589 is a deficient number, since it is larger than the sum of its proper divisors (1).

84747861838589 is an equidigital number, since it uses as much as digits as its factorization.

84747861838589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20808990720, while the sum is 86.

The spelling of 84747861838589 in words is "eighty-four trillion, seven hundred forty-seven billion, eight hundred sixty-one million, eight hundred thirty-eight thousand, five hundred eighty-nine".