998400833 has 2 divisors, whose sum is σ = 998400834. Its totient is φ = 998400832.

The previous prime is 998400817. The next prime is 998400839. The reversal of 998400833 is 338004899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504316849 + 494083984 = 22457^2 + 22228^2 .

It is an emirp because it is prime and its reverse (338004899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998400833 - 2⁴ = 998400817 is a prime.

It is not a weakly prime, because it can be changed into another prime (998400839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499200416 + 499200417.

It is an arithmetic number, because the mean of its divisors is an integer number (499200417).

Almost surely, 2^998400833 is an apocalyptic number.

It is an amenable number.

998400833 is a deficient number, since it is larger than the sum of its proper divisors (1).

998400833 is an equidigital number, since it uses as much as digits as its factorization.

998400833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 998400833 is about 31597.4814344435. The cubic root of 998400833 is about 999.4666599323.

The spelling of 998400833 in words is "nine hundred ninety-eight million, four hundred thousand, eight hundred thirty-three".