82318309 has 2 divisors, whose sum is σ = 82318310. Its totient is φ = 82318308.

The previous prime is 82318273. The next prime is 82318319. The reversal of 82318309 is 90381328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74909025 + 7409284 = 8655^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 82318309 - 2⁹ = 82317797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82318319) 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 as a sum of consecutive naturals, namely, 41159154 + 41159155.

It is an arithmetic number, because the mean of its divisors is an integer number (41159155).

Almost surely, 2^82318309 is an apocalyptic number.

It is an amenable number.

82318309 is a deficient number, since it is larger than the sum of its proper divisors (1).

82318309 is an equidigital number, since it uses as much as digits as its factorization.

82318309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 82318309 is about 9072.9437890907. The cubic root of 82318309 is about 435.0095721679.

The spelling of 82318309 in words is "eighty-two million, three hundred eighteen thousand, three hundred nine".