398821717559 has 2 divisors, whose sum is σ = 398821717560. Its totient is φ = 398821717558.

The previous prime is 398821717529. The next prime is 398821717597. The reversal of 398821717559 is 955717128893.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 398821717559 - 2⁸ = 398821717303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398821717495 and 398821717504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398821717529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199410858779 + 199410858780.

It is an arithmetic number, because the mean of its divisors is an integer number (199410858780).

Almost surely, 2^398821717559 is an apocalyptic number.

398821717559 is a deficient number, since it is larger than the sum of its proper divisors (1).

398821717559 is an equidigital number, since it uses as much as digits as its factorization.

398821717559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38102400, while the sum is 65.

The spelling of 398821717559 in words is "three hundred ninety-eight billion, eight hundred twenty-one million, seven hundred seventeen thousand, five hundred fifty-nine".