82099009 has 2 divisors, whose sum is σ = 82099010. Its totient is φ = 82099008.

The previous prime is 82098977. The next prime is 82099013. The reversal of 82099009 is 90099028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 15186609 = 8180^2 + 3897^2 .

It is a cyclic number.

It is not a de Polignac number, because 82099009 - 2⁵ = 82098977 is a prime.

It is not a weakly prime, because it can be changed into another prime (82099079) 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, 41049504 + 41049505.

It is an arithmetic number, because the mean of its divisors is an integer number (41049505).

Almost surely, 2^82099009 is an apocalyptic number.

It is an amenable number.

82099009 is a deficient number, since it is larger than the sum of its proper divisors (1).

82099009 is an equidigital number, since it uses as much as digits as its factorization.

82099009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 82099009 is about 9060.8503464079. The cubic root of 82099009 is about 434.6229330328.

The spelling of 82099009 in words is "eighty-two million, ninety-nine thousand, nine".