82711691 has 4 divisors (see below), whose sum is σ = 82830384. Its totient is φ = 82593000.

The previous prime is 82711679. The next prime is 82711711. The reversal of 82711691 is 19611728.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82711691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82711621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58295 + ... + 59696.

It is an arithmetic number, because the mean of its divisors is an integer number (20707596).

Almost surely, 2^82711691 is an apocalyptic number.

82711691 is a deficient number, since it is larger than the sum of its proper divisors (118693).

82711691 is a wasteful number, since it uses less digits than its factorization.

82711691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118692.

The product of its digits is 6048, while the sum is 35.

The square root of 82711691 is about 9094.5968024976. The cubic root of 82711691 is about 435.7014112370.

The spelling of 82711691 in words is "eighty-two million, seven hundred eleven thousand, six hundred ninety-one".