84109311959 has 2 divisors, whose sum is σ = 84109311960. Its totient is φ = 84109311958.

The previous prime is 84109311947. The next prime is 84109311971. The reversal of 84109311959 is 95911390148.

It is a balanced prime because it is at equal distance from previous prime (84109311947) and next prime (84109311971).

It is a cyclic number.

It is not a de Polignac number, because 84109311959 - 2¹⁶ = 84109246423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84109311989) 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, 42054655979 + 42054655980.

It is an arithmetic number, because the mean of its divisors is an integer number (42054655980).

Almost surely, 2^84109311959 is an apocalyptic number.

84109311959 is a deficient number, since it is larger than the sum of its proper divisors (1).

84109311959 is an equidigital number, since it uses as much as digits as its factorization.

84109311959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 84109311959 in words is "eighty-four billion, one hundred nine million, three hundred eleven thousand, nine hundred fifty-nine".