117217839 has 8 divisors (see below), whose sum is σ = 165484080. Its totient is φ = 73548416.

The previous prime is 117217831. The next prime is 117217847. The reversal of 117217839 is 938712711.

It is an interprime number because it is at equal distance from previous prime (117217831) and next prime (117217847).

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

It is a cyclic number.

It is not a de Polignac number, because 117217839 - 2³ = 117217831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117217797 and 117217806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117217831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149144 + ... + 1149245.

It is an arithmetic number, because the mean of its divisors is an integer number (20685510).

Almost surely, 2^117217839 is an apocalyptic number.

117217839 is a deficient number, since it is larger than the sum of its proper divisors (48266241).

117217839 is a wasteful number, since it uses less digits than its factorization.

117217839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298409.

The product of its digits is 21168, while the sum is 39.

The square root of 117217839 is about 10826.7187550061. The cubic root of 117217839 is about 489.4006819625.

The spelling of 117217839 in words is "one hundred seventeen million, two hundred seventeen thousand, eight hundred thirty-nine".