985121617 has 8 divisors (see below), whose sum is σ = 995804480. Its totient is φ = 974468880.

The previous prime is 985121611. The next prime is 985121629. The reversal of 985121617 is 716121589.

It is a happy number.

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-985121617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 985121617.

It is not an unprimeable number, because it can be changed into a prime (985121611) 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 7 ways as a sum of consecutive naturals, for example, 61618 + ... + 75940.

It is an arithmetic number, because the mean of its divisors is an integer number (124475560).

Almost surely, 2^985121617 is an apocalyptic number.

It is an amenable number.

985121617 is a deficient number, since it is larger than the sum of its proper divisors (10682863).

985121617 is a wasteful number, since it uses less digits than its factorization.

985121617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15063.

The product of its digits is 30240, while the sum is 40.

The square root of 985121617 is about 31386.6471130639. The cubic root of 985121617 is about 995.0157374008.

The spelling of 985121617 in words is "nine hundred eighty-five million, one hundred twenty-one thousand, six hundred seventeen".