998547911 has 2 divisors, whose sum is σ = 998547912. Its totient is φ = 998547910.

The previous prime is 998547883. The next prime is 998547917. The reversal of 998547911 is 119745899.

998547911 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998547911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998547917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499273955 + 499273956.

It is an arithmetic number, because the mean of its divisors is an integer number (499273956).

Almost surely, 2^998547911 is an apocalyptic number.

998547911 is a deficient number, since it is larger than the sum of its proper divisors (1).

998547911 is an equidigital number, since it uses as much as digits as its factorization.

998547911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 53.

The square root of 998547911 is about 31599.8087177755. The cubic root of 998547911 is about 999.5157358594.

The spelling of 998547911 in words is "nine hundred ninety-eight million, five hundred forty-seven thousand, nine hundred eleven".