82867709 has 2 divisors, whose sum is σ = 82867710. Its totient is φ = 82867708.

The previous prime is 82867699. The next prime is 82867711. The reversal of 82867709 is 90776828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77827684 + 5040025 = 8822^2 + 2245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82867709 is a prime.

It is a Sophie Germain prime.

Together with 82867711, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82867739) 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, 41433854 + 41433855.

It is an arithmetic number, because the mean of its divisors is an integer number (41433855).

Almost surely, 2^82867709 is an apocalyptic number.

It is an amenable number.

82867709 is a deficient number, since it is larger than the sum of its proper divisors (1).

82867709 is an equidigital number, since it uses as much as digits as its factorization.

82867709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 82867709 is about 9103.1702719437. The cubic root of 82867709 is about 435.9751918242.

The spelling of 82867709 in words is "eighty-two million, eight hundred sixty-seven thousand, seven hundred nine".