398882178439 has 2 divisors, whose sum is σ = 398882178440. Its totient is φ = 398882178438.

The previous prime is 398882178419. The next prime is 398882178449. The reversal of 398882178439 is 934871288893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398882178439 - 2⁷ = 398882178311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398882178419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199441089219 + 199441089220.

It is an arithmetic number, because the mean of its divisors is an integer number (199441089220).

Almost surely, 2^398882178439 is an apocalyptic number.

398882178439 is a deficient number, since it is larger than the sum of its proper divisors (1).

398882178439 is an equidigital number, since it uses as much as digits as its factorization.

398882178439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 167215104, while the sum is 70.

The spelling of 398882178439 in words is "three hundred ninety-eight billion, eight hundred eighty-two million, one hundred seventy-eight thousand, four hundred thirty-nine".