398559001 has 2 divisors, whose sum is σ = 398559002. Its totient is φ = 398559000.

The previous prime is 398558989. The next prime is 398559017. The reversal of 398559001 is 100955893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393824025 + 4734976 = 19845^2 + 2176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-398559001 is a prime.

It is not a weakly prime, because it can be changed into another prime (398559041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199279500 + 199279501.

It is an arithmetic number, because the mean of its divisors is an integer number (199279501).

Almost surely, 2^398559001 is an apocalyptic number.

It is an amenable number.

398559001 is a deficient number, since it is larger than the sum of its proper divisors (1).

398559001 is an equidigital number, since it uses as much as digits as its factorization.

398559001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 398559001 is about 19963.9425214560. The cubic root of 398559001 is about 735.9204541719.

The spelling of 398559001 in words is "three hundred ninety-eight million, five hundred fifty-nine thousand, one".