117886829 has 4 divisors (see below), whose sum is σ = 118325340. Its totient is φ = 117448320.

The previous prime is 117886817. The next prime is 117886841. The reversal of 117886829 is 928688711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 928688711 = 13309 ⋅69779.

It is an interprime number because it is at equal distance from previous prime (117886817) and next prime (117886841).

It can be written as a sum of positive squares in 2 ways, for example, as 57078025 + 60808804 = 7555^2 + 7798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117886829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117886859) 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, 218852 + ... + 219389.

It is an arithmetic number, because the mean of its divisors is an integer number (29581335).

Almost surely, 2^117886829 is an apocalyptic number.

It is an amenable number.

117886829 is a deficient number, since it is larger than the sum of its proper divisors (438511).

117886829 is an equidigital number, since it uses as much as digits as its factorization.

117886829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438510.

The product of its digits is 387072, while the sum is 50.

The square root of 117886829 is about 10857.5701241116. The cubic root of 117886829 is about 490.3299582418.

The spelling of 117886829 in words is "one hundred seventeen million, eight hundred eighty-six thousand, eight hundred twenty-nine".