998947911 has 32 divisors (see below), whose sum is σ = 1465051392. Its totient is φ = 601735680.

The previous prime is 998947889. The next prime is 998947913. The reversal of 998947911 is 119749899.

It is not a de Polignac number, because 998947911 - 2⁵ = 998947879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998947913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 364416 + ... + 367146.

It is an arithmetic number, because the mean of its divisors is an integer number (45782856).

Almost surely, 2^998947911 is an apocalyptic number.

998947911 is a deficient number, since it is larger than the sum of its proper divisors (466103481).

998947911 is a wasteful number, since it uses less digits than its factorization.

998947911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943.

The product of its digits is 1469664, while the sum is 57.

The square root of 998947911 is about 31606.1372363027. The cubic root of 998947911 is about 999.6491806068.

The spelling of 998947911 in words is "nine hundred ninety-eight million, nine hundred forty-seven thousand, nine hundred eleven".