85681705 has 16 divisors (see below), whose sum is σ = 105753600. Its totient is φ = 66609472.

The previous prime is 85681703. The next prime is 85681709. The reversal of 85681705 is 50718658.

It is a cyclic number.

It is not a de Polignac number, because 85681705 - 2¹ = 85681703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85681703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33792 + ... + 36238.

It is an arithmetic number, because the mean of its divisors is an integer number (6609600).

Almost surely, 2^85681705 is an apocalyptic number.

It is an amenable number.

85681705 is a deficient number, since it is larger than the sum of its proper divisors (20071895).

85681705 is a wasteful number, since it uses less digits than its factorization.

85681705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 85681705 is about 9256.4412708124. The cubic root of 85681705 is about 440.8552665627.

The spelling of 85681705 in words is "eighty-five million, six hundred eighty-one thousand, seven hundred five".