71718 has 8 divisors (see below), whose sum is σ = 143448. Its totient is φ = 23904.

The previous prime is 71713. The next prime is 71719. The reversal of 71718 is 81717.

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

71718 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71711) by changing a digit.

71718 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5971 + ... + 5982.

It is an arithmetic number, because the mean of its divisors is an integer number (17931).

2⁷¹⁷¹⁸ is an apocalyptic number.

71718 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71724).

71718 is a wasteful number, since it uses less digits than its factorization.

71718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11958.

The product of its digits is 392, while the sum is 24.

The square root of 71718 is about 267.8021657866. The cubic root of 71718 is about 41.5472920975.

Subtracting 71718 from its reverse (81717), we obtain a palindrome (9999).

The spelling of 71718 in words is "seventy-one thousand, seven hundred eighteen".