117916186 has 4 divisors (see below), whose sum is σ = 176874282. Its totient is φ = 58958092.

The previous prime is 117916171. The next prime is 117916213. The reversal of 117916186 is 681619711.

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

It can be written as a sum of positive squares in only one way, i.e., 77352025 + 40564161 = 8795^2 + 6369^2 .

It is a super-3 number, since 3×117916186³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 29479045 + ... + 29479048.

Almost surely, 2^117916186 is an apocalyptic number.

117916186 is a deficient number, since it is larger than the sum of its proper divisors (58958096).

117916186 is an equidigital number, since it uses as much as digits as its factorization.

117916186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58958095.

The product of its digits is 18144, while the sum is 40.

The square root of 117916186 is about 10858.9219538590. The cubic root of 117916186 is about 490.3706566585.

It can be divided in two parts, 11 and 7916186, that added together give a palindrome (7916197).

The spelling of 117916186 in words is "one hundred seventeen million, nine hundred sixteen thousand, one hundred eighty-six".