398528017 has 2 divisors, whose sum is σ = 398528018. Its totient is φ = 398528016.

The previous prime is 398527981. The next prime is 398528047. The reversal of 398528017 is 710825893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328370641 + 70157376 = 18121^2 + 8376^2 .

It is a cyclic number.

It is not a de Polignac number, because 398528017 - 2²⁷ = 264310289 is a prime.

It is not a weakly prime, because it can be changed into another prime (398528047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199264008 + 199264009.

It is an arithmetic number, because the mean of its divisors is an integer number (199264009).

Almost surely, 2^398528017 is an apocalyptic number.

It is an amenable number.

398528017 is a deficient number, since it is larger than the sum of its proper divisors (1).

398528017 is an equidigital number, since it uses as much as digits as its factorization.

398528017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 398528017 is about 19963.1665073455. The cubic root of 398528017 is about 735.9013835113.

The spelling of 398528017 in words is "three hundred ninety-eight million, five hundred twenty-eight thousand, seventeen".