117618139 has 4 divisors (see below), whose sum is σ = 117692320. Its totient is φ = 117543960.

The previous prime is 117618133. The next prime is 117618143. The reversal of 117618139 is 931816711.

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

It is a cyclic number.

It is not a de Polignac number, because 117618139 - 2¹¹ = 117616091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117618098 and 117618107.

It is not an unprimeable number, because it can be changed into a prime (117618133) 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, 34659 + ... + 37900.

It is an arithmetic number, because the mean of its divisors is an integer number (29423080).

Almost surely, 2^117618139 is an apocalyptic number.

117618139 is a deficient number, since it is larger than the sum of its proper divisors (74181).

117618139 is an equidigital number, since it uses as much as digits as its factorization.

117618139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74180.

The product of its digits is 9072, while the sum is 37.

The square root of 117618139 is about 10845.1896710016. The cubic root of 117618139 is about 489.9571516051.

It can be divided in two parts, 11761 and 8139, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 117618139 in words is "one hundred seventeen million, six hundred eighteen thousand, one hundred thirty-nine".