117139186 has 4 divisors (see below), whose sum is σ = 175708782. Its totient is φ = 58569592.

The previous prime is 117139177. The next prime is 117139189. The reversal of 117139186 is 681931711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 681931711 = 43 ⋅15858877.

It can be written as a sum of positive squares in only one way, i.e., 92448225 + 24690961 = 9615^2 + 4969^2 .

It is not an unprimeable number, because it can be changed into a prime (117139189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29284795 + ... + 29284798.

Almost surely, 2^117139186 is an apocalyptic number.

117139186 is a deficient number, since it is larger than the sum of its proper divisors (58569596).

117139186 is an equidigital number, since it uses as much as digits as its factorization.

117139186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58569595.

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

The square root of 117139186 is about 10823.0857891823. The cubic root of 117139186 is about 489.2911950876.

The spelling of 117139186 in words is "one hundred seventeen million, one hundred thirty-nine thousand, one hundred eighty-six".