83708809 has 2 divisors, whose sum is σ = 83708810. Its totient is φ = 83708808.

The previous prime is 83708797. The next prime is 83708827. The reversal of 83708809 is 90880738.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62805625 + 20903184 = 7925^2 + 4572^2 .

It is a cyclic number.

It is not a de Polignac number, because 83708809 - 2²¹ = 81611657 is a prime.

It is not a weakly prime, because it can be changed into another prime (83708899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41854404 + 41854405.

It is an arithmetic number, because the mean of its divisors is an integer number (41854405).

Almost surely, 2^83708809 is an apocalyptic number.

It is an amenable number.

83708809 is a deficient number, since it is larger than the sum of its proper divisors (1).

83708809 is an equidigital number, since it uses as much as digits as its factorization.

83708809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 83708809 is about 9149.2518273354. The cubic root of 83708809 is about 437.4452659690.

The spelling of 83708809 in words is "eighty-three million, seven hundred eight thousand, eight hundred nine".