82108791 has 6 divisors (see below), whose sum is σ = 118601600. Its totient is φ = 54739188.

The previous prime is 82108777. The next prime is 82108813. The reversal of 82108791 is 19780128.

It is not a de Polignac number, because 82108791 - 2⁶ = 82108727 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 (82108391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4561591 + ... + 4561608.

Almost surely, 2^82108791 is an apocalyptic number.

82108791 is a deficient number, since it is larger than the sum of its proper divisors (36492809).

82108791 is a wasteful number, since it uses less digits than its factorization.

82108791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9123205 (or 9123202 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 82108791 is about 9061.3901251408. The cubic root of 82108791 is about 434.6401939504.

The spelling of 82108791 in words is "eighty-two million, one hundred eight thousand, seven hundred ninety-one".