82081191 has 8 divisors (see below), whose sum is σ = 109640304. Its totient is φ = 54621440.

The previous prime is 82081187. The next prime is 82081201. The reversal of 82081191 is 19118028.

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 82081191 - 2² = 82081187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82081291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22890 + ... + 26231.

It is an arithmetic number, because the mean of its divisors is an integer number (13705038).

Almost surely, 2^82081191 is an apocalyptic number.

82081191 is a deficient number, since it is larger than the sum of its proper divisors (27559113).

82081191 is a wasteful number, since it uses less digits than its factorization.

82081191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49681.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 82081191 is about 9059.8670520047. The cubic root of 82081191 is about 434.5914885942.

The spelling of 82081191 in words is "eighty-two million, eighty-one thousand, one hundred ninety-one".