82168791 has 8 divisors (see below), whose sum is σ = 109609200. Its totient is φ = 54753792.

The previous prime is 82168777. The next prime is 82168799. The reversal of 82168791 is 19786128.

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

It is not a de Polignac number, because 82168791 - 2⁵ = 82168759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82168799) 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, 3285 + ... + 13233.

It is an arithmetic number, because the mean of its divisors is an integer number (13701150).

Almost surely, 2^82168791 is an apocalyptic number.

82168791 is a deficient number, since it is larger than the sum of its proper divisors (27440409).

82168791 is a wasteful number, since it uses less digits than its factorization.

82168791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12705.

The product of its digits is 48384, while the sum is 42.

The square root of 82168791 is about 9064.7002708308. The cubic root of 82168791 is about 434.7460375177.

The spelling of 82168791 in words is "eighty-two million, one hundred sixty-eight thousand, seven hundred ninety-one".