985138439 has 8 divisors (see below), whose sum is σ = 1020099360. Its totient is φ = 950243616.

The previous prime is 985138421. The next prime is 985138477. The reversal of 985138439 is 934831589.

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

It is a cyclic number.

It is not a de Polignac number, because 985138439 - 2¹⁶ = 985072903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985138409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14849 + ... + 46805.

It is an arithmetic number, because the mean of its divisors is an integer number (127512420).

Almost surely, 2^985138439 is an apocalyptic number.

985138439 is a deficient number, since it is larger than the sum of its proper divisors (34960921).

985138439 is a wasteful number, since it uses less digits than its factorization.

985138439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33049.

The product of its digits is 933120, while the sum is 50.

The square root of 985138439 is about 31386.9150921208. The cubic root of 985138439 is about 995.0214010195.

The spelling of 985138439 in words is "nine hundred eighty-five million, one hundred thirty-eight thousand, four hundred thirty-nine".