998213873 has 2 divisors, whose sum is σ = 998213874. Its totient is φ = 998213872.

The previous prime is 998213851. The next prime is 998213917. The reversal of 998213873 is 378312899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801569344 + 196644529 = 28312^2 + 14023^2 .

It is a cyclic number.

It is not a de Polignac number, because 998213873 - 2⁶ = 998213809 is a prime.

It is not a weakly prime, because it can be changed into another prime (998213833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499106936 + 499106937.

It is an arithmetic number, because the mean of its divisors is an integer number (499106937).

Almost surely, 2^998213873 is an apocalyptic number.

It is an amenable number.

998213873 is a deficient number, since it is larger than the sum of its proper divisors (1).

998213873 is an equidigital number, since it uses as much as digits as its factorization.

998213873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 998213873 is about 31594.5228322885. The cubic root of 998213873 is about 999.4042695090.

The spelling of 998213873 in words is "nine hundred ninety-eight million, two hundred thirteen thousand, eight hundred seventy-three".