84258036817 has 2 divisors, whose sum is σ = 84258036818. Its totient is φ = 84258036816.

The previous prime is 84258036809. The next prime is 84258036901. The reversal of 84258036817 is 71863085248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66012511041 + 18245525776 = 256929^2 + 135076^2 .

It is a cyclic number.

It is not a de Polignac number, because 84258036817 - 2³ = 84258036809 is a prime.

It is not a weakly prime, because it can be changed into another prime (84258036017) 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, 42129018408 + 42129018409.

It is an arithmetic number, because the mean of its divisors is an integer number (42129018409).

Almost surely, 2^84258036817 is an apocalyptic number.

It is an amenable number.

84258036817 is a deficient number, since it is larger than the sum of its proper divisors (1).

84258036817 is an equidigital number, since it uses as much as digits as its factorization.

84258036817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2580480, while the sum is 52.

The spelling of 84258036817 in words is "eighty-four billion, two hundred fifty-eight million, thirty-six thousand, eight hundred seventeen".