998598089 has 2 divisors, whose sum is σ = 998598090. Its totient is φ = 998598088.

The previous prime is 998598047. The next prime is 998598131. The reversal of 998598089 is 980895899.

It is a balanced prime because it is at equal distance from previous prime (998598047) and next prime (998598131).

It can be written as a sum of positive squares in only one way, i.e., 847799689 + 150798400 = 29117^2 + 12280^2 .

It is a cyclic number.

It is not a de Polignac number, because 998598089 - 2²⁰ = 997549513 is a prime.

It is not a weakly prime, because it can be changed into another prime (998598389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499299044 + 499299045.

It is an arithmetic number, because the mean of its divisors is an integer number (499299045).

Almost surely, 2^998598089 is an apocalyptic number.

It is an amenable number.

998598089 is a deficient number, since it is larger than the sum of its proper divisors (1).

998598089 is an equidigital number, since it uses as much as digits as its factorization.

998598089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 65.

The square root of 998598089 is about 31600.6026683037. The cubic root of 998598089 is about 999.5324777904.

The spelling of 998598089 in words is "nine hundred ninety-eight million, five hundred ninety-eight thousand, eighty-nine".