84187594609 has 2 divisors, whose sum is σ = 84187594610. Its totient is φ = 84187594608.

The previous prime is 84187594549. The next prime is 84187594619. The reversal of 84187594609 is 90649578148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83876848225 + 310746384 = 289615^2 + 17628^2 .

It is a cyclic number.

It is not a de Polignac number, because 84187594609 - 2¹⁹ = 84187070321 is a prime.

It is not a weakly prime, because it can be changed into another prime (84187594619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42093797304 + 42093797305.

It is an arithmetic number, because the mean of its divisors is an integer number (42093797305).

Almost surely, 2^84187594609 is an apocalyptic number.

It is an amenable number.

84187594609 is a deficient number, since it is larger than the sum of its proper divisors (1).

84187594609 is an equidigital number, since it uses as much as digits as its factorization.

84187594609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 84187594609 in words is "eighty-four billion, one hundred eighty-seven million, five hundred ninety-four thousand, six hundred nine".