80209109 has 2 divisors, whose sum is σ = 80209110. Its totient is φ = 80209108.

The previous prime is 80209097. The next prime is 80209123. The reversal of 80209109 is 90190208.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80156209 + 52900 = 8953^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 80209109 - 2²⁰ = 79160533 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 (80209159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40104554 + 40104555.

It is an arithmetic number, because the mean of its divisors is an integer number (40104555).

Almost surely, 2^80209109 is an apocalyptic number.

It is an amenable number.

80209109 is a deficient number, since it is larger than the sum of its proper divisors (1).

80209109 is an equidigital number, since it uses as much as digits as its factorization.

80209109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 80209109 is about 8955.9538297157. The cubic root of 80209109 is about 431.2620377792.

The spelling of 80209109 in words is "eighty million, two hundred nine thousand, one hundred nine".