80105609 has 2 divisors, whose sum is σ = 80105610. Its totient is φ = 80105608.

The previous prime is 80105579. The next prime is 80105611. The reversal of 80105609 is 90650108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67289209 + 12816400 = 8203^2 + 3580^2 .

It is a cyclic number.

It is not a de Polignac number, because 80105609 - 2²⁴ = 63328393 is a prime.

Together with 80105611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80107609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40052804 + 40052805.

It is an arithmetic number, because the mean of its divisors is an integer number (40052805).

Almost surely, 2^80105609 is an apocalyptic number.

It is an amenable number.

80105609 is a deficient number, since it is larger than the sum of its proper divisors (1).

80105609 is an equidigital number, since it uses as much as digits as its factorization.

80105609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 80105609 is about 8950.1736854656. The cubic root of 80105609 is about 431.0764610446.

The spelling of 80105609 in words is "eighty million, one hundred five thousand, six hundred nine".