398844232177 has 2 divisors, whose sum is σ = 398844232178. Its totient is φ = 398844232176.

The previous prime is 398844232153. The next prime is 398844232211. The reversal of 398844232177 is 771232448893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243388302336 + 155455929841 = 493344^2 + 394279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398844232177 is a prime.

It is not a weakly prime, because it can be changed into another prime (398844232147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199422116088 + 199422116089.

It is an arithmetic number, because the mean of its divisors is an integer number (199422116089).

Almost surely, 2^398844232177 is an apocalyptic number.

It is an amenable number.

398844232177 is a deficient number, since it is larger than the sum of its proper divisors (1).

398844232177 is an equidigital number, since it uses as much as digits as its factorization.

398844232177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 58.

The spelling of 398844232177 in words is "three hundred ninety-eight billion, eight hundred forty-four million, two hundred thirty-two thousand, one hundred seventy-seven".