84147776189 has 2 divisors, whose sum is σ = 84147776190. Its totient is φ = 84147776188.

The previous prime is 84147776147. The next prime is 84147776197. The reversal of 84147776189 is 98167774148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83901756964 + 246019225 = 289658^2 + 15685^2 .

It is a cyclic number.

It is not a de Polignac number, because 84147776189 - 2¹⁶ = 84147710653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84147779189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42073888094 + 42073888095.

It is an arithmetic number, because the mean of its divisors is an integer number (42073888095).

Almost surely, 2^84147776189 is an apocalyptic number.

It is an amenable number.

84147776189 is a deficient number, since it is larger than the sum of its proper divisors (1).

84147776189 is an equidigital number, since it uses as much as digits as its factorization.

84147776189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18966528, while the sum is 62.

The spelling of 84147776189 in words is "eighty-four billion, one hundred forty-seven million, seven hundred seventy-six thousand, one hundred eighty-nine".