985887000781 has 2 divisors, whose sum is σ = 985887000782. Its totient is φ = 985887000780.

The previous prime is 985887000739. The next prime is 985887000793. The reversal of 985887000781 is 187000788589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 947682780100 + 38204220681 = 973490^2 + 195459^2 .

It is a cyclic number.

It is not a de Polignac number, because 985887000781 - 2¹⁵ = 985886968013 is a prime.

It is a super-2 number, since 2×985887000781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985882000781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492943500390 + 492943500391.

It is an arithmetic number, because the mean of its divisors is an integer number (492943500391).

Almost surely, 2^985887000781 is an apocalyptic number.

It is an amenable number.

985887000781 is a deficient number, since it is larger than the sum of its proper divisors (1).

985887000781 is an equidigital number, since it uses as much as digits as its factorization.

985887000781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9031680, while the sum is 61.

The spelling of 985887000781 in words is "nine hundred eighty-five billion, eight hundred eighty-seven million, seven hundred eighty-one", and thus it is an aban number.