398830793549 has 2 divisors, whose sum is σ = 398830793550. Its totient is φ = 398830793548.

The previous prime is 398830793531. The next prime is 398830793551. The reversal of 398830793549 is 945397038893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398801091049 + 29702500 = 631507^2 + 5450^2 .

It is a cyclic number.

It is not a de Polignac number, because 398830793549 - 2¹² = 398830789453 is a prime.

Together with 398830793551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398830796549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199415396774 + 199415396775.

It is an arithmetic number, because the mean of its divisors is an integer number (199415396775).

Almost surely, 2^398830793549 is an apocalyptic number.

It is an amenable number.

398830793549 is a deficient number, since it is larger than the sum of its proper divisors (1).

398830793549 is an equidigital number, since it uses as much as digits as its factorization.

398830793549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176359680, while the sum is 68.

The spelling of 398830793549 in words is "three hundred ninety-eight billion, eight hundred thirty million, seven hundred ninety-three thousand, five hundred forty-nine".