84320079989 has 2 divisors, whose sum is σ = 84320079990. Its totient is φ = 84320079988.

The previous prime is 84320079971. The next prime is 84320080001. The reversal of 84320079989 is 98997002348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66327881764 + 17992198225 = 257542^2 + 134135^2 .

It is a cyclic number.

It is not a de Polignac number, because 84320079989 - 2⁸ = 84320079733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84320079929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42160039994 + 42160039995.

It is an arithmetic number, because the mean of its divisors is an integer number (42160039995).

Almost surely, 2^84320079989 is an apocalyptic number.

It is an amenable number.

84320079989 is a deficient number, since it is larger than the sum of its proper divisors (1).

84320079989 is an equidigital number, since it uses as much as digits as its factorization.

84320079989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 59.

The spelling of 84320079989 in words is "eighty-four billion, three hundred twenty million, seventy-nine thousand, nine hundred eighty-nine".