384942858917 has 2 divisors, whose sum is σ = 384942858918. Its totient is φ = 384942858916.

The previous prime is 384942858913. The next prime is 384942859001. The reversal of 384942858917 is 719858249483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383079296356 + 1863562561 = 618934^2 + 43169^2 .

It is a cyclic number.

It is not a de Polignac number, because 384942858917 - 2² = 384942858913 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384942858913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192471429458 + 192471429459.

It is an arithmetic number, because the mean of its divisors is an integer number (192471429459).

Almost surely, 2^384942858917 is an apocalyptic number.

It is an amenable number.

384942858917 is a deficient number, since it is larger than the sum of its proper divisors (1).

384942858917 is an equidigital number, since it uses as much as digits as its factorization.

384942858917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139345920, while the sum is 68.

The spelling of 384942858917 in words is "three hundred eighty-four billion, nine hundred forty-two million, eight hundred fifty-eight thousand, nine hundred seventeen".