101718 has 12 divisors (see below), whose sum is σ = 220428. Its totient is φ = 33900.

The previous prime is 101701. The next prime is 101719. The reversal of 101718 is 817101.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5651 = 101718 / (1 + 0 + 1 + 7 + 1 + 8).

It is a plaindrome in base 5.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 101718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101719) by changing a digit.

101718 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 5 ways as a sum of consecutive naturals, for example, 2808 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (18369).

2¹⁰¹⁷¹⁸ is an apocalyptic number.

101718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

101718 is an abundant number, since it is smaller than the sum of its proper divisors (118710).

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

101718 is a wasteful number, since it uses less digits than its factorization.

101718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659 (or 5656 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

The square root of 101718 is about 318.9325947595. The cubic root of 101718 is about 46.6801888252.

Adding to 101718 its reverse (817101), we get a palindrome (918819).

It can be divided in two parts, 1017 and 18, that added together give a triangular number (1035 = T₄₅).

The spelling of 101718 in words is "one hundred one thousand, seven hundred eighteen".