998421133 has 2 divisors, whose sum is σ = 998421134. Its totient is φ = 998421132.

The previous prime is 998421091. The next prime is 998421163. The reversal of 998421133 is 331124899.

998421133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 788374084 + 210047049 = 28078^2 + 14493^2 .

It is a cyclic number.

It is not a de Polignac number, because 998421133 - 2¹⁷ = 998290061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998421163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499210566 + 499210567.

It is an arithmetic number, because the mean of its divisors is an integer number (499210567).

Almost surely, 2^998421133 is an apocalyptic number.

It is an amenable number.

998421133 is a deficient number, since it is larger than the sum of its proper divisors (1).

998421133 is an equidigital number, since it uses as much as digits as its factorization.

998421133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 998421133 is about 31597.8026609446. The cubic root of 998421133 is about 999.4734337767.

The spelling of 998421133 in words is "nine hundred ninety-eight million, four hundred twenty-one thousand, one hundred thirty-three".