985989145 has 8 divisors (see below), whose sum is σ = 1183498056. Its totient is φ = 788583936.

The previous prime is 985989143. The next prime is 985989149. The reversal of 985989145 is 541989589.

It can be written as a sum of positive squares in 4 ways, for example, as 44235801 + 941753344 = 6651^2 + 30688^2 .

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 985989145 - 2¹ = 985989143 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 985989145.

It is not an unprimeable number, because it can be changed into a prime (985989143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3192 + ... + 44521.

It is an arithmetic number, because the mean of its divisors is an integer number (147937257).

Almost surely, 2^985989145 is an apocalyptic number.

It is an amenable number.

985989145 is a deficient number, since it is larger than the sum of its proper divisors (197508911).

985989145 is a wasteful number, since it uses less digits than its factorization.

985989145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51851.

The product of its digits is 4665600, while the sum is 58.

The square root of 985989145 is about 31400.4640889271. The cubic root of 985989145 is about 995.3077320587.

The spelling of 985989145 in words is "nine hundred eighty-five million, nine hundred eighty-nine thousand, one hundred forty-five".