85640093 has 24 divisors (see below), whose sum is σ = 110561760. Its totient is φ = 65577120.

The previous prime is 85640081. The next prime is 85640099. The reversal of 85640093 is 39004658.

It is not a de Polignac number, because 85640093 - 2⁸ = 85639837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85640099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30455 + ... + 33147.

It is an arithmetic number, because the mean of its divisors is an integer number (4606740).

Almost surely, 2^85640093 is an apocalyptic number.

It is an amenable number.

85640093 is a deficient number, since it is larger than the sum of its proper divisors (24921667).

85640093 is a wasteful number, since it uses less digits than its factorization.

85640093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777 (or 2770 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 85640093 is about 9254.1932657580. The cubic root of 85640093 is about 440.7838867198.

The spelling of 85640093 in words is "eighty-five million, six hundred forty thousand, ninety-three".