398209932079 has 2 divisors, whose sum is σ = 398209932080. Its totient is φ = 398209932078.

The previous prime is 398209932077. The next prime is 398209932151. The reversal of 398209932079 is 970239902893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398209932079 - 2¹ = 398209932077 is a prime.

Together with 398209932077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398209932073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199104966039 + 199104966040.

It is an arithmetic number, because the mean of its divisors is an integer number (199104966040).

Almost surely, 2^398209932079 is an apocalyptic number.

398209932079 is a deficient number, since it is larger than the sum of its proper divisors (1).

398209932079 is an equidigital number, since it uses as much as digits as its factorization.

398209932079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 398209932079 in words is "three hundred ninety-eight billion, two hundred nine million, nine hundred thirty-two thousand, seventy-nine".