398783497260077 has 2 divisors, whose sum is σ = 398783497260078. Its totient is φ = 398783497260076.

The previous prime is 398783497260067. The next prime is 398783497260193. The reversal of 398783497260077 is 770062794387893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204541883690596 + 194241613569481 = 14301814^2 + 13937059^2 .

It is an emirp because it is prime and its reverse (770062794387893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398783497260077 - 2⁶ = 398783497260013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 398783497259983 and 398783497260010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398783497260007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199391748630038 + 199391748630039.

It is an arithmetic number, because the mean of its divisors is an integer number (199391748630039).

Almost surely, 2^{398783497260077} is an apocalyptic number.

It is an amenable number.

398783497260077 is a deficient number, since it is larger than the sum of its proper divisors (1).

398783497260077 is an equidigital number, since it uses as much as digits as its factorization.

398783497260077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5377010688, while the sum is 80.

The spelling of 398783497260077 in words is "three hundred ninety-eight trillion, seven hundred eighty-three billion, four hundred ninety-seven million, two hundred sixty thousand, seventy-seven".