993234217589 has 2 divisors, whose sum is σ = 993234217590. Its totient is φ = 993234217588.

The previous prime is 993234217571. The next prime is 993234217631. The reversal of 993234217589 is 985712432399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 870940630564 + 122293587025 = 933242^2 + 349705^2 .

It is an emirp because it is prime and its reverse (985712432399) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993234217589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993234217529) 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, 496617108794 + 496617108795.

It is an arithmetic number, because the mean of its divisors is an integer number (496617108795).

Almost surely, 2^993234217589 is an apocalyptic number.

It is an amenable number.

993234217589 is a deficient number, since it is larger than the sum of its proper divisors (1).

993234217589 is an equidigital number, since it uses as much as digits as its factorization.

993234217589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 62.

The spelling of 993234217589 in words is "nine hundred ninety-three billion, two hundred thirty-four million, two hundred seventeen thousand, five hundred eighty-nine".