191148911 has 8 divisors (see below), whose sum is σ = 202375920. Its totient is φ = 180038592.

The previous prime is 191148907. The next prime is 191148943. The reversal of 191148911 is 119841191.

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 191148911 - 2² = 191148907 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 (191148211) 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, 25790 + ... + 32363.

It is an arithmetic number, because the mean of its divisors is an integer number (25296990).

Almost surely, 2^191148911 is an apocalyptic number.

191148911 is a deficient number, since it is larger than the sum of its proper divisors (11227009).

191148911 is a wasteful number, since it uses less digits than its factorization.

191148911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58345.

The product of its digits is 2592, while the sum is 35.

The square root of 191148911 is about 13825.6613223383. The cubic root of 191148911 is about 576.0461469185.

The spelling of 191148911 in words is "one hundred ninety-one million, one hundred forty-eight thousand, nine hundred eleven".