117131717 has 4 divisors (see below), whose sum is σ = 124021836. Its totient is φ = 110241600.

The previous prime is 117131701. The next prime is 117131747. The reversal of 117131717 is 717131711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62504836 + 54626881 = 7906^2 + 7391^2 .

It is not a de Polignac number, because 117131717 - 2⁴ = 117131701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117131717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117131747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3445034 + ... + 3445067.

It is an arithmetic number, because the mean of its divisors is an integer number (31005459).

Almost surely, 2^117131717 is an apocalyptic number.

117131717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

117131717 is a deficient number, since it is larger than the sum of its proper divisors (6890119).

117131717 is an equidigital number, since it uses as much as digits as its factorization.

117131717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6890118.

The product of its digits is 1029, while the sum is 29.

The square root of 117131717 is about 10822.7407342133. The cubic root of 117131717 is about 489.2807955116.

The spelling of 117131717 in words is "one hundred seventeen million, one hundred thirty-one thousand, seven hundred seventeen".