998322089 has 2 divisors, whose sum is σ = 998322090. Its totient is φ = 998322088.

The previous prime is 998322011. The next prime is 998322113. The reversal of 998322089 is 980223899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777294400 + 221027689 = 27880^2 + 14867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998322089 is a prime.

It is not a weakly prime, because it can be changed into another prime (998325089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499161044 + 499161045.

It is an arithmetic number, because the mean of its divisors is an integer number (499161045).

Almost surely, 2^998322089 is an apocalyptic number.

It is an amenable number.

998322089 is a deficient number, since it is larger than the sum of its proper divisors (1).

998322089 is an equidigital number, since it uses as much as digits as its factorization.

998322089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 998322089 is about 31596.2353611945. The cubic root of 998322089 is about 999.4403832208.

The spelling of 998322089 in words is "nine hundred ninety-eight million, three hundred twenty-two thousand, eighty-nine".