985109911 has 8 divisors (see below), whose sum is σ = 1024201584. Its totient is φ = 946735680.

The previous prime is 985109893. The next prime is 985109959. The reversal of 985109911 is 119901589.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985109911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985109611) 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 in 7 ways as a sum of consecutive naturals, for example, 176560 + ... + 182053.

It is an arithmetic number, because the mean of its divisors is an integer number (128025198).

Almost surely, 2^985109911 is an apocalyptic number.

985109911 is a deficient number, since it is larger than the sum of its proper divisors (39091673).

985109911 is a wasteful number, since it uses less digits than its factorization.

985109911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358721.

The product of its (nonzero) digits is 29160, while the sum is 43.

The square root of 985109911 is about 31386.4606319349. The cubic root of 985109911 is about 995.0117961953.

The spelling of 985109911 in words is "nine hundred eighty-five million, one hundred nine thousand, nine hundred eleven".