85218089 has 8 divisors (see below), whose sum is σ = 93924768. Its totient is φ = 76671360.

The previous prime is 85218073. The next prime is 85218113. The reversal of 85218089 is 98081258.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85218089 - 2⁴ = 85218073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85218989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38867 + ... + 41000.

It is an arithmetic number, because the mean of its divisors is an integer number (11740596).

Almost surely, 2^85218089 is an apocalyptic number.

It is an amenable number.

85218089 is a deficient number, since it is larger than the sum of its proper divisors (8706679).

85218089 is a wasteful number, since it uses less digits than its factorization.

85218089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79975.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 85218089 is about 9231.3644170296. The cubic root of 85218089 is about 440.0586853543.

The spelling of 85218089 in words is "eighty-five million, two hundred eighteen thousand, eighty-nine".