117717 has 4 divisors (see below), whose sum is σ = 156960. Its totient is φ = 78476.

The previous prime is 117709. The next prime is 117721. The reversal of 117717 is 717711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 717711 = 3 ⋅239237.

It is a cyclic number.

It is not a de Polignac number, because 117717 - 2³ = 117709 is a prime.

It is a D-number.

117717 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 117717.

It is not an unprimeable number, because it can be changed into a prime (117727) 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 3 ways as a sum of consecutive naturals, for example, 19617 + ... + 19622.

It is an arithmetic number, because the mean of its divisors is an integer number (39240).

2¹¹⁷⁷¹⁷ is an apocalyptic number.

It is an amenable number.

117717 is a deficient number, since it is larger than the sum of its proper divisors (39243).

117717 is an equidigital number, since it uses as much as digits as its factorization.

117717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39242.

The product of its digits is 343, while the sum is 24.

The square root of 117717 is about 343.0991110452. The cubic root of 117717 is about 49.0094386926.

The spelling of 117717 in words is "one hundred seventeen thousand, seven hundred seventeen", and thus it is an iban number.