985855019 has 2 divisors, whose sum is σ = 985855020. Its totient is φ = 985855018.

The previous prime is 985855009. The next prime is 985855037. The reversal of 985855019 is 910558589.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 985855019 - 2⁸ = 985854763 is a prime.

It is a super-3 number, since 3×985855019³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (985855009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492927509 + 492927510.

It is an arithmetic number, because the mean of its divisors is an integer number (492927510).

Almost surely, 2^985855019 is an apocalyptic number.

985855019 is a deficient number, since it is larger than the sum of its proper divisors (1).

985855019 is an equidigital number, since it uses as much as digits as its factorization.

985855019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648000, while the sum is 50.

The square root of 985855019 is about 31398.3282835249. The cubic root of 985855019 is about 995.2625988037.

The spelling of 985855019 in words is "nine hundred eighty-five million, eight hundred fifty-five thousand, nineteen".