191307117 has 8 divisors (see below), whose sum is σ = 255155680. Its totient is φ = 127498320.

The previous prime is 191307101. The next prime is 191307121. The reversal of 191307117 is 711703191.

It is a happy number.

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

It is not a de Polignac number, because 191307117 - 2⁴ = 191307101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191307167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4134 + ... + 19992.

It is an arithmetic number, because the mean of its divisors is an integer number (31894460).

Almost surely, 2^191307117 is an apocalyptic number.

It is an amenable number.

191307117 is a deficient number, since it is larger than the sum of its proper divisors (63848563).

191307117 is a wasteful number, since it uses less digits than its factorization.

191307117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19883.

The product of its (nonzero) digits is 1323, while the sum is 30.

The square root of 191307117 is about 13831.3816012718. The cubic root of 191307117 is about 576.2050262362.

The spelling of 191307117 in words is "one hundred ninety-one million, three hundred seven thousand, one hundred seventeen".