82309687 has 2 divisors, whose sum is σ = 82309688. Its totient is φ = 82309686.

The previous prime is 82309649. The next prime is 82309693. The reversal of 82309687 is 78690328.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82309687 - 2⁷ = 82309559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82309607) 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 as a sum of consecutive naturals, namely, 41154843 + 41154844.

It is an arithmetic number, because the mean of its divisors is an integer number (41154844).

Almost surely, 2^82309687 is an apocalyptic number.

82309687 is a deficient number, since it is larger than the sum of its proper divisors (1).

82309687 is an equidigital number, since it uses as much as digits as its factorization.

82309687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 82309687 is about 9072.4686276669. The cubic root of 82309687 is about 434.9943840381.

The spelling of 82309687 in words is "eighty-two million, three hundred nine thousand, six hundred eighty-seven".