398845398293 has 2 divisors, whose sum is σ = 398845398294. Its totient is φ = 398845398292.

The previous prime is 398845398257. The next prime is 398845398337. The reversal of 398845398293 is 392893548893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266510965009 + 132334433284 = 516247^2 + 363778^2 .

It is a cyclic number.

It is not a de Polignac number, because 398845398293 - 2¹² = 398845394197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398845395293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199422699146 + 199422699147.

It is an arithmetic number, because the mean of its divisors is an integer number (199422699147).

Almost surely, 2^398845398293 is an apocalyptic number.

It is an amenable number.

398845398293 is a deficient number, since it is larger than the sum of its proper divisors (1).

398845398293 is an equidigital number, since it uses as much as digits as its factorization.

398845398293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403107840, while the sum is 71.

The spelling of 398845398293 in words is "three hundred ninety-eight billion, eight hundred forty-five million, three hundred ninety-eight thousand, two hundred ninety-three".