985227999989 has 2 divisors, whose sum is σ = 985227999990. Its totient is φ = 985227999988.

The previous prime is 985227999947. The next prime is 985228000079. The reversal of 985227999989 is 989999722589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634319859364 + 350908140625 = 796442^2 + 592375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985227999989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 985227999989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985227999929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492613999994 + 492613999995.

It is an arithmetic number, because the mean of its divisors is an integer number (492613999995).

Almost surely, 2^985227999989 is an apocalyptic number.

It is an amenable number.

985227999989 is a deficient number, since it is larger than the sum of its proper divisors (1).

985227999989 is an equidigital number, since it uses as much as digits as its factorization.

985227999989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4761711360, while the sum is 86.

The spelling of 985227999989 in words is "nine hundred eighty-five billion, two hundred twenty-seven million, nine hundred ninety-nine thousand, nine hundred eighty-nine".