85620009 has 16 divisors (see below), whose sum is σ = 117925632. Its totient is φ = 55222608.

The previous prime is 85620001. The next prime is 85620043. The reversal of 85620009 is 90002658.

It is not a de Polignac number, because 85620009 - 2³ = 85620001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85620001) 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, 10702 + ... + 16904.

It is an arithmetic number, because the mean of its divisors is an integer number (7370352).

Almost surely, 2^85620009 is an apocalyptic number.

It is an amenable number.

85620009 is a deficient number, since it is larger than the sum of its proper divisors (32305623).

85620009 is a wasteful number, since it uses less digits than its factorization.

85620009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 85620009 is about 9253.1080724263. The cubic root of 85620009 is about 440.7494270199.

The spelling of 85620009 in words is "eighty-five million, six hundred twenty thousand, nine".