398826078433 has 2 divisors, whose sum is σ = 398826078434. Its totient is φ = 398826078432.

The previous prime is 398826078383. The next prime is 398826078487. The reversal of 398826078433 is 334870628893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292959140049 + 105866938384 = 541257^2 + 325372^2 .

It is a cyclic number.

It is not a de Polignac number, because 398826078433 - 2⁹ = 398826077921 is a prime.

It is not a weakly prime, because it can be changed into another prime (398826078493) 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, 199413039216 + 199413039217.

It is an arithmetic number, because the mean of its divisors is an integer number (199413039217).

Almost surely, 2^398826078433 is an apocalyptic number.

It is an amenable number.

398826078433 is a deficient number, since it is larger than the sum of its proper divisors (1).

398826078433 is an equidigital number, since it uses as much as digits as its factorization.

398826078433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 398826078433 in words is "three hundred ninety-eight billion, eight hundred twenty-six million, seventy-eight thousand, four hundred thirty-three".