117815939 has 8 divisors (see below), whose sum is σ = 120120000. Its totient is φ = 115532352.

The previous prime is 117815923. The next prime is 117815953. The reversal of 117815939 is 939518711.

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 117815939 - 2⁴ = 117815923 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 117815939.

It is not an unprimeable number, because it can be changed into a prime (117815969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6767 + ... + 16775.

It is an arithmetic number, because the mean of its divisors is an integer number (15015000).

Almost surely, 2^117815939 is an apocalyptic number.

117815939 is a deficient number, since it is larger than the sum of its proper divisors (2304061).

117815939 is a wasteful number, since it uses less digits than its factorization.

117815939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10237.

The product of its digits is 68040, while the sum is 44.

The square root of 117815939 is about 10854.3050906081. The cubic root of 117815939 is about 490.2316536198.

The spelling of 117815939 in words is "one hundred seventeen million, eight hundred fifteen thousand, nine hundred thirty-nine".