117645839 has 8 divisors (see below), whose sum is σ = 118652688. Its totient is φ = 116643520.

The previous prime is 117645833. The next prime is 117645883. The reversal of 117645839 is 938546711.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117645839 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 117645839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117645833) 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 7 ways as a sum of consecutive naturals, for example, 67499 + ... + 69219.

It is an arithmetic number, because the mean of its divisors is an integer number (14831586).

Almost surely, 2^117645839 is an apocalyptic number.

117645839 is a deficient number, since it is larger than the sum of its proper divisors (1006849).

117645839 is a wasteful number, since it uses less digits than its factorization.

117645839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2265.

The product of its digits is 181440, while the sum is 44.

The square root of 117645839 is about 10846.4666597008. The cubic root of 117645839 is about 489.9956115114.

The spelling of 117645839 in words is "one hundred seventeen million, six hundred forty-five thousand, eight hundred thirty-nine".