398527784401 has 2 divisors, whose sum is σ = 398527784402. Its totient is φ = 398527784400.

The previous prime is 398527784371. The next prime is 398527784407. The reversal of 398527784401 is 104487725893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366073401600 + 32454382801 = 605040^2 + 180151^2 .

It is a cyclic number.

It is not a de Polignac number, because 398527784401 - 2³⁷ = 261088830929 is a prime.

It is not a weakly prime, because it can be changed into another prime (398527784407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199263892200 + 199263892201.

It is an arithmetic number, because the mean of its divisors is an integer number (199263892201).

Almost surely, 2^398527784401 is an apocalyptic number.

It is an amenable number.

398527784401 is a deficient number, since it is larger than the sum of its proper divisors (1).

398527784401 is an equidigital number, since it uses as much as digits as its factorization.

398527784401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 398527784401 in words is "three hundred ninety-eight billion, five hundred twenty-seven million, seven hundred eighty-four thousand, four hundred one".