819782085 has 16 divisors (see below), whose sum is σ = 1343643840. Its totient is φ = 426552960.

The previous prime is 819782083. The next prime is 819782129. The reversal of 819782085 is 580287918.

819782085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 819782085 - 2¹ = 819782083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819782081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 665875 + ... + 667104.

It is an arithmetic number, because the mean of its divisors is an integer number (83977740).

Almost surely, 2^819782085 is an apocalyptic number.

It is an amenable number.

819782085 is a deficient number, since it is larger than the sum of its proper divisors (523861755).

819782085 is a wasteful number, since it uses less digits than its factorization.

819782085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333028.

The product of its (nonzero) digits is 322560, while the sum is 48.

The square root of 819782085 is about 28631.8369127795. The cubic root of 819782085 is about 935.9072418398.

The spelling of 819782085 in words is "eight hundred nineteen million, seven hundred eighty-two thousand, eighty-five".