998951911 has 2 divisors, whose sum is σ = 998951912. Its totient is φ = 998951910.

The previous prime is 998951887. The next prime is 998951953. The reversal of 998951911 is 119159899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998951911 - 2⁵ = 998951879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998954911) 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, 499475955 + 499475956.

It is an arithmetic number, because the mean of its divisors is an integer number (499475956).

Almost surely, 2^998951911 is an apocalyptic number.

998951911 is a deficient number, since it is larger than the sum of its proper divisors (1).

998951911 is an equidigital number, since it uses as much as digits as its factorization.

998951911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 52.

The square root of 998951911 is about 31606.2005150888. The cubic root of 998951911 is about 999.6505148744.

The spelling of 998951911 in words is "nine hundred ninety-eight million, nine hundred fifty-one thousand, nine hundred eleven".