82086691 has 2 divisors, whose sum is σ = 82086692. Its totient is φ = 82086690.

The previous prime is 82086689. The next prime is 82086737. The reversal of 82086691 is 19668028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82086691 - 2¹ = 82086689 is a prime.

Together with 82086689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82086611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41043345 + 41043346.

It is an arithmetic number, because the mean of its divisors is an integer number (41043346).

Almost surely, 2^82086691 is an apocalyptic number.

82086691 is a deficient number, since it is larger than the sum of its proper divisors (1).

82086691 is an equidigital number, since it uses as much as digits as its factorization.

82086691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 82086691 is about 9060.1705833831. The cubic root of 82086691 is about 434.6011952427.

The spelling of 82086691 in words is "eighty-two million, eighty-six thousand, six hundred ninety-one".