398878838443 has 2 divisors, whose sum is σ = 398878838444. Its totient is φ = 398878838442.

The previous prime is 398878838431. The next prime is 398878838453. The reversal of 398878838443 is 344838878893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398878838443 is a prime.

It is not a weakly prime, because it can be changed into another prime (398878838453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199439419221 + 199439419222.

It is an arithmetic number, because the mean of its divisors is an integer number (199439419222).

Almost surely, 2^398878838443 is an apocalyptic number.

398878838443 is a deficient number, since it is larger than the sum of its proper divisors (1).

398878838443 is an equidigital number, since it uses as much as digits as its factorization.

398878838443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 891813888, while the sum is 73.

It can be divided in two parts, 398878 and 838443, that added together give a palindrome (1237321).

The spelling of 398878838443 in words is "three hundred ninety-eight billion, eight hundred seventy-eight million, eight hundred thirty-eight thousand, four hundred forty-three".