398830792777 has 2 divisors, whose sum is σ = 398830792778. Its totient is φ = 398830792776.

The previous prime is 398830792769. The next prime is 398830792823. The reversal of 398830792777 is 777297038893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203801685136 + 195029107641 = 451444^2 + 441621^2 .

It is a cyclic number.

It is not a de Polignac number, because 398830792777 - 2³ = 398830792769 is a prime.

It is not a weakly prime, because it can be changed into another prime (398830792747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199415396388 + 199415396389.

It is an arithmetic number, because the mean of its divisors is an integer number (199415396389).

Almost surely, 2^398830792777 is an apocalyptic number.

It is an amenable number.

398830792777 is a deficient number, since it is larger than the sum of its proper divisors (1).

398830792777 is an equidigital number, since it uses as much as digits as its factorization.

398830792777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224042112, while the sum is 70.

The spelling of 398830792777 in words is "three hundred ninety-eight billion, eight hundred thirty million, seven hundred ninety-two thousand, seven hundred seventy-seven".