1008668389 has 2 divisors, whose sum is σ = 1008668390. Its totient is φ = 1008668388.

The previous prime is 1008668357. The next prime is 1008668399. The reversal of 1008668389 is 9838668001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 848848225 + 159820164 = 29135^2 + 12642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1008668389 - 2⁵ = 1008668357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1008668399) 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, 504334194 + 504334195.

It is an arithmetic number, because the mean of its divisors is an integer number (504334195).

Almost surely, 2^1008668389 is an apocalyptic number.

It is an amenable number.

1008668389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1008668389 is an equidigital number, since it uses as much as digits as its factorization.

1008668389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 1008668389 is about 31759.5401257638. The cubic root of 1008668389 is about 1002.8811539795.

The spelling of 1008668389 in words is "one billion, eight million, six hundred sixty-eight thousand, three hundred eighty-nine".