108020309 has 2 divisors, whose sum is σ = 108020310. Its totient is φ = 108020308.

The previous prime is 108020303. The next prime is 108020317. The reversal of 108020309 is 903020801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 52562500 = 7447^2 + 7250^2 .

It is an emirp because it is prime and its reverse (903020801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108020309 - 2⁴ = 108020293 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108020303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54010154 + 54010155.

It is an arithmetic number, because the mean of its divisors is an integer number (54010155).

Almost surely, 2^108020309 is an apocalyptic number.

It is an amenable number.

108020309 is a deficient number, since it is larger than the sum of its proper divisors (1).

108020309 is an equidigital number, since it uses as much as digits as its factorization.

108020309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 108020309 is about 10393.2819166998. The cubic root of 108020309 is about 476.2501642084.

The spelling of 108020309 in words is "one hundred eight million, twenty thousand, three hundred nine".