985212549 has 12 divisors (see below), whose sum is σ = 1423363500. Its totient is φ = 656679744.

The previous prime is 985212511. The next prime is 985212551. The reversal of 985212549 is 945212589.

It is a happy number.

985212549 is a `hidden beast` number, since 9 + 85 + 21 + 2 + 549 = 666.

985212549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 720922500 + 264290049 = 26850^2 + 16257^2 .

It is not a de Polignac number, because 985212549 - 2¹³ = 985204357 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985212559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68977 + ... + 82025.

It is an arithmetic number, because the mean of its divisors is an integer number (118613625).

Almost surely, 2^985212549 is an apocalyptic number.

985212549 is the 16778-th nonagonal number.

It is an amenable number.

985212549 is a deficient number, since it is larger than the sum of its proper divisors (438150951).

985212549 is a wasteful number, since it uses less digits than its factorization.

985212549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21444 (or 21441 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 985212549 is about 31388.0956574304. The cubic root of 985212549 is about 995.0463515523.

The spelling of 985212549 in words is "nine hundred eighty-five million, two hundred twelve thousand, five hundred forty-nine".