82618309 has 2 divisors, whose sum is σ = 82618310. Its totient is φ = 82618308.

The previous prime is 82618259. The next prime is 82618331. The reversal of 82618309 is 90381628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65561409 + 17056900 = 8097^2 + 4130^2 .

It is a cyclic number.

It is not a de Polignac number, because 82618309 - 2⁹ = 82617797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82318309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41309154 + 41309155.

It is an arithmetic number, because the mean of its divisors is an integer number (41309155).

Almost surely, 2^82618309 is an apocalyptic number.

It is an amenable number.

82618309 is a deficient number, since it is larger than the sum of its proper divisors (1).

82618309 is an equidigital number, since it uses as much as digits as its factorization.

82618309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 82618309 is about 9089.4614251891. The cubic root of 82618309 is about 435.5373796468.

The spelling of 82618309 in words is "eighty-two million, six hundred eighteen thousand, three hundred nine".