1984664317 has 2 divisors, whose sum is σ = 1984664318. Its totient is φ = 1984664316.

The previous prime is 1984664293. The next prime is 1984664369. The reversal of 1984664317 is 7134664891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1806335001 + 178329316 = 42501^2 + 13354^2 .

It is an emirp because it is prime and its reverse (7134664891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1984664317 - 2²⁷ = 1850446589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984668317) 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, 992332158 + 992332159.

It is an arithmetic number, because the mean of its divisors is an integer number (992332159).

Almost surely, 2^1984664317 is an apocalyptic number.

It is an amenable number.

1984664317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984664317 is an equidigital number, since it uses as much as digits as its factorization.

1984664317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 1984664317 is about 44549.5714569736. The cubic root of 1984664317 is about 1256.6924921187.

The spelling of 1984664317 in words is "one billion, nine hundred eighty-four million, six hundred sixty-four thousand, three hundred seventeen".