398375366399 has 2 divisors, whose sum is σ = 398375366400. Its totient is φ = 398375366398.

The previous prime is 398375366357. The next prime is 398375366407. The reversal of 398375366399 is 993663573893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398375366399 - 2¹² = 398375362303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398375326399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199187683199 + 199187683200.

It is an arithmetic number, because the mean of its divisors is an integer number (199187683200).

Almost surely, 2^398375366399 is an apocalyptic number.

398375366399 is a deficient number, since it is larger than the sum of its proper divisors (1).

398375366399 is an equidigital number, since it uses as much as digits as its factorization.

398375366399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 595213920, while the sum is 71.

The spelling of 398375366399 in words is "three hundred ninety-eight billion, three hundred seventy-five million, three hundred sixty-six thousand, three hundred ninety-nine".