998590589 has 2 divisors, whose sum is σ = 998590590. Its totient is φ = 998590588.

The previous prime is 998590583. The next prime is 998590597. The reversal of 998590589 is 985095899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 593896900 + 404693689 = 24370^2 + 20117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998590589 is a prime.

It is a super-3 number, since 3×998590589³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998590583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499295294 + 499295295.

It is an arithmetic number, because the mean of its divisors is an integer number (499295295).

Almost surely, 2^998590589 is an apocalyptic number.

It is an amenable number.

998590589 is a deficient number, since it is larger than the sum of its proper divisors (1).

998590589 is an equidigital number, since it uses as much as digits as its factorization.

998590589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 62.

The square root of 998590589 is about 31600.4839994580. The cubic root of 998590589 is about 999.5299754449.

The spelling of 998590589 in words is "nine hundred ninety-eight million, five hundred ninety thousand, five hundred eighty-nine".