398494589 has 2 divisors, whose sum is σ = 398494590. Its totient is φ = 398494588.

The previous prime is 398494583. The next prime is 398494609. The reversal of 398494589 is 985494893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377719225 + 20775364 = 19435^2 + 4558^2 .

It is a cyclic number.

It is not a de Polignac number, because 398494589 - 2²⁰ = 397446013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398494583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199247294 + 199247295.

It is an arithmetic number, because the mean of its divisors is an integer number (199247295).

Almost surely, 2^398494589 is an apocalyptic number.

It is an amenable number.

398494589 is a deficient number, since it is larger than the sum of its proper divisors (1).

398494589 is an equidigital number, since it uses as much as digits as its factorization.

398494589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11197440, while the sum is 59.

The square root of 398494589 is about 19962.3292478608. The cubic root of 398494589 is about 735.8808074596.

The spelling of 398494589 in words is "three hundred ninety-eight million, four hundred ninety-four thousand, five hundred eighty-nine".