398533887289 has 2 divisors, whose sum is σ = 398533887290. Its totient is φ = 398533887288.

The previous prime is 398533887281. The next prime is 398533887379. The reversal of 398533887289 is 982788335893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209756672064 + 188777215225 = 457992^2 + 434485^2 .

It is a cyclic number.

It is not a de Polignac number, because 398533887289 - 2³ = 398533887281 is a prime.

It is not a weakly prime, because it can be changed into another prime (398533887281) 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, 199266943644 + 199266943645.

It is an arithmetic number, because the mean of its divisors is an integer number (199266943645).

Almost surely, 2^398533887289 is an apocalyptic number.

It is an amenable number.

398533887289 is a deficient number, since it is larger than the sum of its proper divisors (1).

398533887289 is an equidigital number, since it uses as much as digits as its factorization.

398533887289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627056640, while the sum is 73.

The spelling of 398533887289 in words is "three hundred ninety-eight billion, five hundred thirty-three million, eight hundred eighty-seven thousand, two hundred eighty-nine".