998343791 has 2 divisors, whose sum is σ = 998343792. Its totient is φ = 998343790.

The previous prime is 998343769. The next prime is 998343817. The reversal of 998343791 is 197343899.

It is a happy number.

998343791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998343791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998343761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499171895 + 499171896.

It is an arithmetic number, because the mean of its divisors is an integer number (499171896).

Almost surely, 2^998343791 is an apocalyptic number.

998343791 is a deficient number, since it is larger than the sum of its proper divisors (1).

998343791 is an equidigital number, since it uses as much as digits as its factorization.

998343791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 53.

The square root of 998343791 is about 31596.5787863180. The cubic root of 998343791 is about 999.4476252717.

The spelling of 998343791 in words is "nine hundred ninety-eight million, three hundred forty-three thousand, seven hundred ninety-one".