71810085 has 8 divisors (see below), whose sum is σ = 114896160. Its totient is φ = 38298704.

The previous prime is 71810083. The next prime is 71810093. The reversal of 71810085 is 58001817.

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 71810085 - 2¹ = 71810083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71810083) 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 7 ways as a sum of consecutive naturals, for example, 2393655 + ... + 2393684.

It is an arithmetic number, because the mean of its divisors is an integer number (14362020).

Almost surely, 2^71810085 is an apocalyptic number.

It is an amenable number.

71810085 is a deficient number, since it is larger than the sum of its proper divisors (43086075).

71810085 is a wasteful number, since it uses less digits than its factorization.

71810085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4787347.

The product of its (nonzero) digits is 2240, while the sum is 30.

The square root of 71810085 is about 8474.0831362455. The cubic root of 71810085 is about 415.6506655717.

The spelling of 71810085 in words is "seventy-one million, eight hundred ten thousand, eighty-five".