398722621079 has 2 divisors, whose sum is σ = 398722621080. Its totient is φ = 398722621078.

The previous prime is 398722621069. The next prime is 398722621201. The reversal of 398722621079 is 970126227893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398722621079 - 2⁸ = 398722620823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398722621069) 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, 199361310539 + 199361310540.

It is an arithmetic number, because the mean of its divisors is an integer number (199361310540).

Almost surely, 2^398722621079 is an apocalyptic number.

398722621079 is a deficient number, since it is larger than the sum of its proper divisors (1).

398722621079 is an equidigital number, since it uses as much as digits as its factorization.

398722621079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 398722621079 in words is "three hundred ninety-eight billion, seven hundred twenty-two million, six hundred twenty-one thousand, seventy-nine".